All tools
The full library
112 calculators across 9 categories — all browser-only and private.
Health & Fitness
19 liveBMI Calculator
Body Mass Index from height and weight.
Body Fat Calculator
Estimate body fat with the U.S. Navy method.
Lean Body Mass Calculator
Fat-free mass from height and weight.
FFMI Calculator
Fat-free mass index for athletes.
Ideal Weight Calculator
Reference weight ranges by height.
BMR Calculator
Basal metabolic rate at rest.
TDEE Calculator
Total daily energy expenditure.
Calorie Calculator
Daily calorie needs by activity level.
Calorie Deficit Calculator
Targets for gradual weight change.
Protein Intake Calculator
Daily protein target in grams.
Macronutrient Calculator
Protein, carbs and fat targets.
Water Intake Calculator
Daily hydration target.
Pace Calculator
Pace, distance and finish time.
Heart Rate Zone Calculator
Five training zones from max HR.
Pregnancy Calculator
Weeks pregnant and trimester.
Due Date Calculator
Estimated due date from LMP.
Pregnancy Conception Calculator
Estimated conception date.
Ovulation Calculator
Estimated fertile window.
Waist-to-Hip Ratio
Body-shape health indicator.
Finance
16 liveMortgage Calculator
Monthly payment and total interest.
Loan Calculator
Personal loan payment estimate.
Auto Loan Calculator
Car payment estimate.
Payment Calculator
Payment from principal, rate and term.
Amortization Calculator
Full loan amortization schedule.
Compound Interest Calculator
Growth with compounding.
Investment Calculator
Future value of investments.
Retirement Calculator
Retirement savings projection.
Savings Goal Calculator
Time to reach a savings target.
Inflation Calculator
Purchasing power over time.
Salary Calculator
Annual salary from hourly rate.
Hourly-to-Salary Calculator
Hourly rate from annual salary.
Budget Allocation Calculator
Split income into needs, wants, savings.
Net Worth Calculator
Assets minus liabilities.
Debt Payoff Calculator
Time to pay off debt.
Credit Card Payoff Calculator
Payoff time and interest.
Islamic Finance
8 liveGeneral Zakat Calculator
Zakat on combined assets.
Cash Zakat Calculator
Zakat on cash holdings.
Gold Zakat Calculator
Zakat on gold you enter by weight.
Silver Zakat Calculator
Zakat on silver you enter by weight.
Business Zakat Calculator
Zakat on business assets.
Investment Zakat Calculator
Zakat on investments.
Nisab Calculator
Nisab threshold from gold or silver.
Fidya Calculator
Fidya for missed fasts.
Math
7 livePercentage Calculator
Find percentages and changes.
Fraction Calculator
Add and multiply fractions.
Scientific Calculator
Basic expressions in the browser.
Average Calculator
Mean of a set of numbers.
Ratio Calculator
Split a total by ratio.
Triangle Calculator
Area and perimeter of triangles.
Random Number Generator
Random integers or decimals.
Date & Time
6 liveEducation
5 liveUnit Converters
12 liveLength Converter
Meters, feet, miles and more.
Weight Converter
Kilograms, pounds and ounces.
Temperature Converter
Celsius, Fahrenheit, Kelvin.
Area Converter
Square meters, acres, hectares.
Volume Converter
Liters, gallons, cups.
Speed Converter
mph, km/h, m/s, knots.
Energy Converter
Joules, calories, kWh.
Time Converter
Seconds, minutes, hours, days.
Fuel Economy Converter
MPG and L/100km.
Cooking Converter
Cups, tablespoons, milliliters.
Manual Exchange Rate Converter
Convert with a rate you enter.
Data Storage Converter
Bytes, KB, MB, GB, TB.
Home & Construction
8 liveConcrete Calculator
Volume for slabs and footings.
Paint Calculator
Liters or gallons needed.
Tile Calculator
Tiles needed for a floor.
Flooring Calculator
Flooring boxes needed.
Gravel Calculator
Gravel volume and tonnage.
Roofing Calculator
Shingle bundles needed.
Wallpaper Calculator
Rolls needed for walls.
Mulch Calculator
Mulch volume for garden beds.
Developer Tools
31 liveUnix Timestamp Converter
Unix time to readable date.
Epoch Converter
Epoch seconds and milliseconds.
Password Generator
Secure random passwords.
Password Strength Checker
Check password strength locally.
Hash Generator
SHA-256, SHA-384, SHA-512.
JSON Formatter
Pretty-print JSON.
JSON Validator
Validate JSON syntax.
JSON Minifier
Compress JSON to one line.
JSON Beautifier
Beautify and indent JSON.
JWT Decoder
Decode JWT header and payload.
UUID Generator
Generate UUID v4.
UUID Validator
Validate UUID format.
Base64 Encoder & Decoder
Encode and decode Base64.
URL Encoder & Decoder
Percent-encode and decode URLs.
HTML Formatter
Indent HTML markup.
CSS Formatter
Format CSS stylesheets.
SQL Formatter
Format SQL queries (never executed).
XML Formatter
Indent XML documents.
YAML Formatter
Clean up YAML formatting.
Regex Tester
Test JavaScript regular expressions.
Markdown Preview
Preview Markdown as HTML.
Cron Expression Parser
Parse cron schedule fields.
Subnet Calculator
Hosts in a CIDR block.
MIME Type Lookup
Common MIME type descriptions.
HTTP Status Code Lookup
HTTP status code meanings.
Color Converter
HEX, RGB and HSL.
QR Code Generator
Make a QR code from text or a URL.
Image Resizer
Resize, convert and strip metadata.
PDF Tools
Merge, split and visually sign PDFs.
CSV ↔ JSON Converter
Convert tabular data locally.
Text Diff Checker
Compare two pieces of text.