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v4 · 304 calculators
Featured
All 304 →Gear Ratio
Compute the ratio of two gear teeth counts and the speed trade-off.
EV Charging
Time and cost to charge an EV given kW and battery size.
3D Print Cost
Filament, electricity, and wear cost per print.
YouTube RPM
Estimated revenue per mille from views and CPM.
Freelance Rate
Hourly rate from desired salary, expenses, and tax.
Coffee Ratio
Grams of coffee and water for a target brew ratio.
Scientific Calculator
Single-expression evaluator with sin/cos/tan, log, ln, sqrt, ^, !, π, and e.
LLM API Token Cost
Estimate OpenAI, Anthropic, and Google API spend from input and output tokens.
All calculators
304 of 304Gear Ratio
Compute the ratio of two gear teeth counts and the speed trade-off.
Engine Displacement
CID / liters from bore × stroke and cylinder count.
EV Charging
Time and cost to charge an EV given kW and battery size.
HP-to-Weight
Power-to-weight ratio and 0–60 estimate.
Trip Fuel Cost
Fuel cost for a road trip given distance, mpg, and price.
3D Print Cost
Filament, electricity, and wear cost per print.
Epoxy Volume
Mixed volume and weight for a resin pour.
LED Resistor
Resistor value and power for an LED circuit.
Planetary Gear
Ratio and output speed for a planetary gear set.
Concrete Estimator
Cubic yards / bags needed for a slab or post.
Crypto Mining
Daily profit given hashrate, power, and pool fee.
YouTube RPM
Estimated revenue per mille from views and CPM.
Video File Size
Estimated file size from bitrate and duration.
Twitch Payout
Sub revenue split given tier mix and cut.
Cloud Bandwidth
Monthly egress cost for AWS / GCP / Cloudflare.
Freelance Rate
Hourly rate from desired salary, expenses, and tax.
E-com Fees
Net margin after marketplace and payment fees.
Reverse GST / VAT
Pull the pre-tax price from a tax-inclusive total.
SaaS Churn
Net MRR change and runway impact from churn + new.
FIRE Number
Your financial-independence number and years to it.
Aquarium Volume
Water volume in gallons and liters from tank dimensions.
Coffee Ratio
Grams of coffee and water for a target brew ratio.
Yarn Stitch
Stitches / rows needed for a panel and yarn needed.
Calorie & Macro Calculator
Daily calorie target plus protein, carbs, and fat split for any goal.
Solar Sizing
Panels and battery bank for an off-grid load.
Brake Horsepower (BHP)
Convert torque × RPM to BHP, kW, and metric PS.
Wheel HP Loss
Crank HP minus drivetrain loss → wheel horsepower.
Torque ↔ HP
Convert lb-ft torque and RPM to horsepower and N·m.
Boost Pressure
Pressure ratio and charge density gain from turbo/supercharger.
Car Loan EMI
Monthly EMI, total interest, and total payable for a car loan.
Fuel Mileage (KMPL/MPG)
Compute mileage in km/L or MPG and L/100 km.
Fuel Tank Range
How far can you drive on a full tank with reserve.
Tire Upsize Offset
Compare two tire sizes for diameter difference and speedo error.
Speedometer Error
Compare indicated vs actual speed to find the error %.
Quarter Mile & Trap
Estimate ET and trap speed from HP and weight.
Engine Oil Capacity
Estimate engine oil capacity from displacement and filter.
Antifreeze Mix
Amount of coolant to drain and replace for a target mix.
Brake Fluid Flush
Bleed-and-flush volume estimate for the brake system.
Battery CCA
Suggested cold-cranking amps for your engine and climate.
Car Depreciation
Project a vehicle's current value after first-year + yearly loss.
Lease vs Buy
Monthly cost comparison between leasing and financing a vehicle.
Vehicle Tax (GST/Cess)
GST, cess, and registration on the way to your on-road price.
VIN Check Digit
Verify a 17-character VIN against its check digit.
Fleet Fuel Consumption
Total monthly fuel use and cost for a vehicle fleet.
Turning Radius
Compute a vehicle's turning radius from wheelbase and steer angle.
Towing Capacity
Maximum trailer weight from GCWR after passengers + cargo.
Tongue Weight
Trailer tongue weight from total trailer weight and load %.
Trailer Braking Distance
Stopping distance for a loaded trailer at speed.
CID ↔ CC Displacement
Convert cubic inches and cubic centimeters / liters.
Wall Paint Area
Gallons of paint needed for a room minus doors and windows.
Wallpaper Rolls
Rolls required for a wall accounting for pattern repeat.
Tile Layout & Grout
Tile count and grout estimate for a floor or wall.
Flooring Square Footage
Square footage and boxes for laminate, vinyl, or wood flooring.
Deck Lumber Board Foot
Boards and board-feet for a wood deck.
Roof Pitch & Rafter
Slope angle and rafter length from rise and run.
Stair Stringer
Steps, riser height, total run, and stringer length.
Drywall Sheet Count
Sheets, screws, and joint compound for a drywall job.
Fence Post Spacing
Number of posts and rails for a fence run.
Retaining Wall Blocks
Blocks, courses, and caps for a retaining wall.
Mulch & Topsoil Volume
Cubic yards and bag count for mulch or topsoil.
Plant Spacing Layout
Plants per row and total plants for a planting bed.
Patio Pavers
Paver count and bedding sand for a patio.
Firewood Cord Volume
Cubic feet, full cords, and face cords in a wood stack.
Air CFM Duct Sizing
Required CFM and duct size for a room's air changes per hour.
Welding Amperage
Suggested MIG/stick amperage for sheet metal thickness.
Pipe Volume & Flow
Flow rate (GPM) and pipe volume from diameter and velocity.
Bolt Torque Spec
Tightening torque for a bolt by diameter and grade.
Screw Thread Pitch
Thread pitch, TPI, and minor diameter for a screw.
Wire Gauge (AWG)
Recommended AWG wire size for amps, run length, and voltage drop.
Picture Mat & Frame
Mat outer size, opening, and rabbet for framing art.
Fabric Yardage
Yardage needed for sewing a pattern with repeats.
Knit Gauge
Cast-on stitches and rows for a knit panel.
Ring Size
US, UK, and EU ring sizes from finger circumference.
CNC Feed Rate
Feed rate and chip load from spindle RPM, flutes, and chip load.
Website Ad Revenue
Daily, monthly, and yearly revenue from impressions × CPM.
Conversion Rate
CR %, revenue, and revenue per visitor.
Cost Per Click (CPC)
CPC, CTR, and effective CPM from spend and clicks.
Customer Acquisition Cost
CAC, LTV:CAC ratio, and payback period.
Return on Ad Spend
ROAS ratio, profit margin, and break-even from ad spend.
Image Aspect Resizer
New height from new width for the same aspect ratio.
Screen PPI
Pixels per inch and dot pitch from a screen's spec.
Display View Distance
Recommended viewing distance for a TV or monitor.
Video Letterbox
Letterbox / pillarbox bar size for any video on any screen.
Audio File Size
File size of an audio recording at a given bitrate.
Podcast Bandwidth
Monthly bandwidth (GB) for podcast downloads.
IP Subnet CIDR
Subnet mask, total addresses, and usable hosts for a CIDR.
Ping Jitter
Average ping, min/max, and jitter from samples.
Password Strength
Bits of entropy and brute-force crack time for a password.
Hash Generator
MD5 and SHA-256 hex digest of arbitrary text.
Base64 Encoder
Encode and decode text to/from Base64.
URL Encoder
Encode and decode URL components and query strings.
Hex ↔ RGB
Convert color values between Hex, RGB, and HSL.
Download Time
Estimated download time from file size and connection speed.
Cron Schedule
Plain-English description and yearly run count for a cron expression.
Markdown Table
Generate a Markdown table with chosen rows, columns, and alignment.
Regex Tester
Test a regex against text and see matches.
JSON Validator
Validate JSON and report keys, size, and error position.
Simple Interest
Interest, total, and effective rate on a principal.
Compound Interest
Future value with custom compounding frequency.
Fixed Deposit Returns
Maturity value and effective APY for a fixed deposit.
PPF Returns
Public Provident Fund maturity after 15 years.
SIP Calculator
Future value of a monthly Systematic Investment Plan.
Mutual Fund Lumpsum
Lumpsum investment growth at a given CAGR.
Dividend Yield Income
Annual and monthly dividend income from shares held.
CAGR
Compound Annual Growth Rate between two values.
Stock Average Down
New average cost after buying more shares at a lower price.
Option Trade P/L
Profit/loss for a long call, long put, or credit spread.
Crypto P/L
Realized crypto profit/loss with exchange fees.
Crypto Staking Yield
Staking reward and daily accrual at a given APR.
Margin vs Markup
Convert between margin and markup percentages.
Breakeven Point
Units and revenue to cover fixed + variable costs.
Inventory Turnover
Turnover ratio and days-on-hand for inventory.
Debt-to-Income (DTI)
Front-end and back-end DTI for a borrower.
Credit Score Impact
Rough FICO estimate from utilization and history.
Hourly to Salary
Annual, monthly, and weekly equivalent of an hourly wage.
Take-Home Net Salary
Net monthly pay after tax, FICA, retirement, and health.
Freelance Invoice Tax
Net to you, tax owed, and reserve from an invoice.
Business Run Rate
Monthly and annual run rate from a partial-month revenue.
Burn Rate
Net monthly burn and runway from cash, spend, and revenue.
Real Estate ROI
Total return, ROI %, and annualized yield on a rental.
Rental Property Cash Flow
Monthly cash flow and NOI for a rental property.
Mortgage EMI
Monthly mortgage EMI, total interest, and total paid.
Down Payment Savings
Future savings and goal progress for a down payment.
Home Affordability
Maximum home price and loan from the 28/36 rule.
Inflation Adjustment
Future cost and today's equivalent at an inflation rate.
Currency Purchasing Power
Equivalence between two CPI values for any amount.
Budget 50/30/20
Allocate an income across needs, wants, and savings.
Tip & Bill Splitter
Tip, total, and per-person share of a bill.
Rent Affordability
Safe (30%) vs aggressive (40%) monthly rent budget from income and debts.
Generic Loan Payment
Amortized monthly payment and total interest for any principal / rate / term.
Daily Water Intake
Recommended daily water from weight, climate, and activity.
Sleep Cycle REM Timer
Wake-up times aligned to 90-min sleep cycles.
BMI Calculator
Body Mass Index and category from weight and height (metric or imperial).
BMR
Basal Metabolic Rate (Mifflin-St Jeor).
TDEE
Total Daily Energy Expenditure across activity levels.
Body Fat (US Navy)
Body fat percentage via the US Navy tape method.
Waist-to-Hip Ratio
Ratio and cardiovascular risk band from waist and hip.
Ideal Body Weight
Devine-formula ideal weight in kg and lb.
Target Heart Rate
Heart-rate zones from age and resting HR.
Pet Age (Dog/Cat)
Convert dog or cat years to human-age equivalent.
Backpack Weight
Maximum pack weight by trip type and body weight.
Hiking Pace Estimator
Naismith-rule hike time with elevation gain.
Running Pace
Pace, speed, and finish time for a distance.
Marathon Predict
Riegel-formula marathon finish time from a recent race.
Recipe Scaler
Scale ingredient quantities by a factor.
Baker's Percentages
Hydration, salt, and dough weight from flour weight.
Liquid Drops
Drops, mL, and teaspoons from a liquid volume.
ABV Distillation
Alcohol by volume and attenuation from OG and FG.
Plant Watering Schedule
Next-water date from species, climate, and pot size.
Greenhouse Heater
Heater wattage for a greenhouse volume and ΔT.
Hydroponic PPM
TDS / PPM from electrical conductivity (EC).
Soil pH Adjustment
Lime or sulfur amount to shift a soil pH.
Composting C:N Ratio
Browns-to-greens ratio and advice for a hot pile.
Addition
Add up to four numbers at once.
Subtraction
Subtract one number from another.
Multiplication
Multiply up to four numbers.
Division
Quotient and remainder for any divisor.
Percentage Calculator
Percent change, percent of a number, and percent increase/decrease between two values.
Percentage of Percentage
a% of b% of a number, with combined %.
Fraction to Decimal
Decimal and percent for any fraction.
Decimal to Fraction
Best rational approximation up to a chosen denominator.
Fraction Simplifier
Reduce a fraction to lowest terms.
Ratio Simplifier
Reduce a:b to lowest terms and decimal form.
GCD / HCF
Greatest Common Divisor of up to three integers.
LCM
Least Common Multiple of up to three integers.
Prime Factorization
Distinct and full prime factors of an integer.
Square Root
√n and n² for any non-negative number.
Cube Root
∛n and n³ for any number.
Exponents (x^y)
Compute x^y and y^x from any two numbers.
Logarithm
log₁₀, ln, and log-base-b for a number.
Factorial (n!)
n! for any non-negative integer up to 170.
Absolute Value
|x| and sign of any number.
Rounding Numbers
Round, floor, and ceiling to any number of decimals.
Scientific Notation
Convert a number to scientific and engineering notation.
Linear Equation
Solve y = mx + b for x, y-intercept, and x-intercept.
Quadratic Equation
Real or complex roots of ax² + bx + c = 0.
Matrix Add/Multiply
Add or multiply two 2×2 matrices.
Vector Dot Product
Dot product, magnitudes, and cos θ for two 3D vectors.
Roman Numerals
Convert between Arabic numerals and Roman numerals.
Binary to Decimal
Decimal, octal, and hex from a binary string.
Decimal to Binary
Binary, octal, and hex from a decimal integer.
Octal/Hex Converter
Convert any base from 2 to 36 to any other base.
Modulo (Remainder)
a mod b and the integer quotient of a ÷ b.
Mean/Median/Mode
Mean, median, and mode of a list of numbers.
Percentage Error
Percent error between measured and actual values.
Absolute Error
Absolute and relative error between two values.
Variance & Std Dev
Variance and standard deviation, sample or population.
Range & Quartiles
Min, Q1, median, Q3, max, IQR, and range of a dataset.
Scientific Calculator
Single-expression evaluator with sin/cos/tan, log, ln, sqrt, ^, !, π, and e.
Square Area & Perimeter
Area and perimeter of a square.
Rectangle Area
Area and perimeter of a rectangle.
Triangle Area
Area via ½bh or Heron's formula, plus perimeter.
Circle Area
Area, circumference, and diameter of a circle.
Trapezoid Area
Area and perimeter of a trapezoid.
Parallelogram Area
Area and perimeter of a parallelogram.
Hexagon Area
Area and perimeter of a regular hexagon.
Octagon Area
Area and perimeter of a regular octagon.
Ellipse Area
Area and Ramanujan perimeter of an ellipse.
Cube Volume
Volume and surface area of a cube.
Rectangular Prism
Volume and surface area of a rectangular prism.
Cylinder Volume
Volume and surface area of a cylinder.
Sphere Volume
Volume and surface area of a sphere.
Cone Volume
Volume and slant of a cone.
Pyramid Volume
Volume and lateral area of a square or round pyramid.
Torus Volume
Volume and surface area of a torus (donut).
Capsule Volume
Volume and surface area of a capsule shape.
Pythagorean Theorem
Solve a²+b²=c² for any side.
Triangle Angles
Find the third angle and remaining sides via law of sines.
Sine/Cosine/Tangent
Six trig functions of an angle in degrees or radians.
Inverse Trig
asin, acos, atan in degrees and radians.
Degrees ↔ Radians
Convert angles between degrees and radians.
Coordinate Distance
Distance between two points (x1,y1) and (x2,y2).
Midpoint
Midpoint of a line between two points.
Slope of a Line
Slope m and y-intercept between two points.
Circle Equation
Standard-form equation of a circle from center and radius.
Permutations (nPr)
n! / (n−r)! for any n and r.
Combinations (nCr)
n! / r!(n−r)! for any n and r.
Coin Toss Probability
P(exactly k heads) from n fair flips.
Dice Roll Probability
P(sum ≥ t) for n dice with s sides.
Margin of Error
Z-score-based margin of error for a sample proportion.
Force (F=ma)
Net force from mass and acceleration.
Kinetic Energy
½mv² kinetic energy of a moving body.
Potential Energy
mgh gravitational potential energy.
Work & Power
Work = F·d and power = W/t.
Velocity / Accel / Time
Solve v = v₀ + at for any variable.
Density (m/V)
Mass per unit volume.
Ohm's Law
Solve V = IR for any variable.
Electrical Power
P = VI and P = V²/R from voltage and current.
Series Resistors
Sum of up to four resistors in series.
Parallel Resistors
Equivalent resistance of up to four parallel resistors.
Capacitor Energy
Energy and charge stored in a capacitor.
Ideal Gas Law
PV = nRT solved for any variable.
Molarity
M = n/V moles per liter.
Molecular Weight
M = m/n for a substance.
Half-Life Decay
Remaining amount, decayed, and decay constant λ.
Wave Speed
v = fλ from frequency and wavelength.
Decibel Distance Drop
dB at a new distance and total drop.
Lux ↔ Lumens
Convert lux, lumens, and area.
Thermal Expansion
ΔL = LαΔT and new length.
Pascal's Law
Hydraulic pressure and output force.
Leverage MA
Mechanical advantage from effort and load arms.
Torque
τ = F × r from force and arm length.
Wind Load
F = ½ρv²CdA wind force on a flat surface.
Momentum
p = mv linear momentum.
Centripetal Force
F = mv²/r centripetal force.
Impulse
J = F·t impulse on an object.
Power From V & I
P = VI, P = I²R, P = V²/R variants.
Gas Density (PV=nRT)
ρ = PM/RT density of an ideal gas.
Sound Intensity
I = P/A watts per square meter.
Wave Energy Density
E = ½ρv²ω²A² total wave energy.
Length Converter
mm, cm, m, km, in, ft, yd, mi.
Area Converter
m², ft², cm², acre, hectare, yd², in².
Weight / Mass
mg, g, kg, oz, lb, stone, ton.
Volume / Fluid
mL, L, gallon, quart, cup, fl-oz, tsp, tbsp.
Temperature
Celsius, Fahrenheit, Kelvin.
Speed
m/s, km/h, mph, knots, ft/s.
Time
ms, s, min, hours, days, weeks, years.
Digital Storage
Bytes, KB, MB, GB, TB, PB (binary).
Pressure
Pa, kPa, psi, bar, atm, mmHg.
Energy / Work
J, kJ, cal, kcal, BTU, kWh, Wh, eV.
Power
W, kW, MW, hp, BTU/h, ft-lb/s.
Torque
N·m, lb-ft, lb-in, kgf·m.
Angle
Degrees, radians, gradians, turns.
Fuel Economy
MPG (US/UK), km/L, L/100km.
Density
kg/m³, g/cm³, lb/ft³, lb/gal.
Flow Rate
L/s, L/min, m³/h, gal/min (GPM).
Data Transfer Rate
bps, kbps, Mbps, Gbps, B/s.
Frequency
Hz, kHz, MHz, GHz, RPM.
Cooking Measures
tsp, tbsp, fl-oz, cup, pint, quart, gallon, mL.
Shoe Size
US, UK, EU, JP, cm shoe sizes.
Clothing Size
US, UK, EU letter sizes for men/women.
Paper Size
A0–A6, B0–B6, Letter, Legal, Tabloid.
Luminance
cd/m², nit, lambert, foot-lambert.
Illuminance
Lux, foot-candle, phot, nox.
Magnetic Field
Tesla, gauss, milligauss.
Radioactivity
Bq, Ci, mCi, μCi, dpm.
Force
N, kN, lbf, dyne, kgf.
Viscosity
Pa·s, cP, poise, lb/(ft·s).
Date Duration
Days, weeks, months, and years between two dates.
Add / Subtract Days
Add or subtract a number of days from a date.
Age Calculator
Exact age in years, months, days, and days to next birthday.
Time Card Hours
Total, regular, overtime, and gross pay for a 5-day card.
Time Zone Converter
Convert a local hour between two UTC offsets.
Leap Year Checker
Is a given year a leap year, and how many days in it.
Countdown Timer
Hours, minutes, and seconds from a number of seconds.
Stopwatch Splits
Total, average, fastest, and slowest split time.
Word Counter
Words, characters, sentences, and paragraphs in text.
Random Number
Generate a sequence of random integers in a range.
Dice Roller
Roll N dice with S sides; total, average, and rolls.
Coin Flipper
Heads/tails counts and probability over many flips.
Password Generator
Random password with chosen character classes.
String Byte Size
Length, byte size, and word count of a string.
Text Case Converter
Convert text to UPPER, lower, Title, Sentence, camel, snake, kebab.
Binary Text Translator
Translate text to/from binary 8-bit codes.
GPA Calculator
GPA on a 4.0 scale from course names, credits, and grades.
Even Bill Splitter
Split a total evenly across N people with optional tip.
Number → Words
Spell a number out in English words (up to 12 digits).
Quick ROI %
Quick return-on-investment percentage from gain and cost.
Grade Calculator
Final percentage and letter grade from weighted assignment categories.
GPA Calculator
Cumulative GPA on a 4.0 scale from class grades and credit hours.
LLM API Token Cost
Estimate OpenAI, Anthropic, and Google API spend from input and output tokens.
AI Short-Form Revenue
Projected YouTube Shorts / Instagram Reels payouts from views, completion, and niche.
Brand Deal Rate
Recommended baseline sponsor pricing from followers, engagement, niche, and deliverable.
Global Tax Comparison
Side-by-side progressive tax liabilities for US, UK, DE, FR, CA, AU, and IN.
Built for speed
Static HTML + tiny inline scripts. The whole site is under 30 kB on the wire.
Works offline
Calculations run in your browser — no server, no tracking, no account needed.
Shareable results
Each calculator encodes its inputs in the URL so you can paste a "your-scenario" link.
A calculator for every kind of decision
Whether you are dialling in brake horsepower from torque and RPM, sizing drywall sheets for a remodel, sanity-checking a CPM ad-revenue projection, or sizing a solar panel bank for an off-grid cabin, the right tool should be one click away. My Very Calculator is a handpicked collection of 304 specialized calculators spread across thirteen categories — automotive, DIY, tech, finance, lifestyle, micro-finance, hobbies, math, geometry, science, unit converters, everyday utilities, and trending AI — that cover the questions people actually ask. Every calculator runs entirely in your browser using vanilla JavaScript: no accounts, no sign-up, no waiting for a server response, and no third-party trackers watching the inputs you type.
Automotive, DIY, and tech
The expanded set adds 25 tools each to the three categories that grew fastest with our readers. On the automotive side, you get a BHP / WHP dyno helper, quarter-mile trap-speed and tire upsize calculators, a VIN check-digit validator, a car-loan EMI solver, and a full set of fleet, towing, and depreciation tools. DIY adds room-sized paint coverage, tile, flooring, roof pitch and stair stringer calculators alongside welding amperage, bolt torque, wire AWG, and a CNC feed-rate helper. Tech and content rounds it out with the everyday creator's panel — CPM ad-revenue, CAC and ROAS, PPI screen specs, aspect-ratio resizer, CIDR subnet, password entropy, MD5/SHA-256 hashes, Base64 and URL encoders, a regex tester, and a JSON validator.
Money, health, and lifestyle
The original 25 anchor the set. The freelance rate and FIRE number calculators help you price your time and your retirement; the e-commerce fee and SaaS churn tools sanity-check a business model; the macros and calories and coffee ratio calculators handle daily-life decisions; and the aquarium volume, solar sizing, and yarn stitch tools cover the hobby space. Every tool uses the same precise unit conversion and rounding logic, and every tool surfaces its results in the unit you actually use.
Why a static, in-browser calculator site?
Most calculator websites slow you down with ad networks, pop-ups, and copy that buries the input fields. We took the opposite approach. Each tool is a tiny island on a static page that loads in under a second on a 3G connection, works offline once visited, and shares a single design system — sharp corners, generous spacing, and a dark mode that follows your system or your toggle. The home page above is your launchpad: pick a category tab, or use the search bar (press / from anywhere) to jump straight to a calculator. Every result is computed locally, so nothing you type ever leaves your device. Bookmark a calculator's URL and the inputs are encoded in the hash, meaning you can paste a link to a colleague and they will see exactly the scenario you saw — no screenshots, no re-typing.
The set is intentionally focused. Three hundred and four dependable tools, each one a real page
with a real URL, beat one thousand thin links that all funnel into a single ad-laden
form. If a tool you need isn't here today, the whole site is built to grow: drop a new
compute function into src/lib/, register it in the calculator directory,
and the home page, sitemap, and search index pick it up automatically. That is the
whole idea — a calm, fast, dependable set of tools that get out of the way and let
the math speak.
Frequently asked questions
Quick answers about the site, the data, and how the math runs.
What is My Real Calculator and how does it work?
My Real Calculator is a free, in-browser collection of 304 specialized calculators covering automotive performance, DIY and construction, tech and content creation, finance, lifestyle, math, geometry, science, unit conversion, everyday utilities, and trending AI tools. Every tool runs entirely in vanilla JavaScript on your device: you type a number, the result appears instantly, and nothing is sent to a server. There is no account to create and no software to install — open the page and start calculating.
Are all the online tools on My Real Calculator completely free to use?
Yes. All 304 calculators are 100% free with no usage limits, no daily caps, and no paywalls. The site is supported by being lightweight and ad-friendly rather than by charging users.
Are there any hidden fees or premium calculators on this website?
No. There are no hidden fees, premium tiers, or "pro" calculators. Every tool on every page is the same one everyone else sees, with the same features and the same level of accuracy.
Do I need to register an account or log in to use My Real Calculator?
No account, login, or registration is required. You can also use the site without providing an email address or any personal information. The only thing stored on your device is your dark-mode preference and a short list of recently-used calculators, kept in localStorage.
Can I use My Real Calculator as a scientific calculator for advanced math and engineering?
For unit-aware engineering work, the site includes an aquarium volume calculator, an LED resistor calculator that returns the nearest E24 standard value, a planetary gear ratio solver, and a concrete estimator for slab and post pours. The data set is intentionally focused on real-world tasks rather than a single multi-purpose scientific calculator, but each tool uses the same precise unit conversion and rounding logic that engineering work demands.
Does My Real Calculator provide full amortization schedules for loan and mortgage calculations?
The current release focuses on the most-asked numbers — monthly payment, total interest, and total cost — rather than a full per-month amortization table. The underlying formulas are the same standard amortization math used by banks (M = P × r(1+r)ⁿ / (1+r)ⁿ − 1), so the headline numbers are exact. A printable schedule view is on the roadmap.
What types of health and fitness calculators are available on the platform?
The health and lifestyle set currently includes a BMI calculator, a macros and calorie calculator that splits your target into protein, carbs, and fat grams, an aquarium volume tool, a coffee ratio brewer, a yarn stitch and skein estimator, and a solar panel and battery sizer for off-grid planning.
Does this website support daily unit conversions like weight, length, and temperature?
Unit conversion is built into the calculators that need it. The aquarium, engine displacement, epoxy volume, coffee ratio, and HP-to-weight tools all let you toggle between metric and US customary units, and the results are updated instantly as you change the unit. Standalone unit converters are coming in a future release.
How often are the financial formulas and data updated on My Real Calculator?
The compute functions are versioned with the site and updated whenever the underlying math changes. Because the formulas live in plain TypeScript files (no remote API), you can review exactly what each calculator does by reading the source — there is no hidden dataset that could silently go stale.
Is My Real Calculator safe to use, and do you store my personal or financial data?
Yes, it is safe. The site does not log, store, or transmit any of the numbers you type. All computation happens in your browser, and the only data persisted on your device is your theme preference and a list of recently-used calculators (which you can clear at any time by clearing site data). The site loads no third-party analytics, ad networks, or tracking pixels.
Can I use My Real Calculator on my mobile phone, tablet, or smart device?
Yes. The site is responsive, the inputs are touch-friendly, and the result tiles scale to any screen size from a small phone to a desktop monitor. On iOS and Android you can also "Add to Home Screen" and the site will install as a standalone app that opens full-screen with the calculator icon.
Does My Real Calculator keep a history of my previous calculations?
By default, no — your inputs are not stored on a server because no server ever sees them. On the home page a short list of the calculators you have visited recently is kept in your browser's local storage, and each calculator's current inputs are mirrored in the URL so you can bookmark a scenario or share it by copying the link.
Can I embed calculators from My Real Calculator onto my own blog or website?
Yes. Every calculator is a real page at a stable URL (for example, myverycalculator.com/c/freelance-rate/), so you can link to it or embed it in an <iframe> on your own site. The pages are self-contained and will run the calculation inside the frame. If you need a different style or a custom embed snippet, get in touch via the About page.