Calculators tools
Maths, money, health and everyday sums
Calculators for finance, maths, health, construction and daily life. Each one explains the formula it uses.
Available now (4)
Age Calculator
Calculate exact age in years, months and days, plus total days and the next birthday.
BMI Calculator
Calculate body mass index from height and weight, in metric or imperial units.
Loan & EMI Calculator
Calculate the monthly repayment, total interest and total cost of a loan from amount, rate and term.
Percentage Calculator
Work out a percentage of a number, what percentage one number is of another, and percentage change.
Planned for this category (157)
These are on the roadmap. They get a page when they actually work — no placeholder pages.
- .env Generator
- A3 Generator
- A4 Generator
- A5 Generator
- Accessible Color Palette Generator
- Area Calculator
- Aspect Ratio Calculator
- Average Calculator
- Battery Runtime Calculator
- Bleed Calculator
- BMR Calculator
- Body Fat Estimate
- Break-even Calculator
- CAGR Calculator
- Calorie Calculator
- Calories Burned Estimate
- Capacitor Code Calculator
- Car Loan Calculator
- Car Payment Calculator
- chmod Calculator
- Circle Calculator
- Color Blindness Simulator
- Commission Calculator
- Compound Interest
- Concrete Calculator
- Cooking Timer
- Cron Expression Explainer
- Cron Expression Generator
- Cups to Grams
- Currency Converter
- Current Calculator
- Depreciation Calculator
- Discount Calculator
- Distance Calculator
- Electrical Energy Calculator
- Email Address Extractor
- Email Case Normalizer
- Email Header Parser
- Email HTML Formatter
- Email HTML Preview
- Email List Cleaner
- Email QR Generator
- Email Signature Generator
- Email Subject Tester
- Email/Markdown/Extra Dev
- EV Charging Cost Calculator
- EV Range Calculator
- Exponent Calculator
- Flooring Calculator
- Font Size Checker
- Force Calculator
- Fraction Calculator
- Fuel Cost Calculator
- GCD Calculator
- Git Command Generator
- Git URL Parser
- Gitignore Generator
- Golden Ratio Calculator
- Gravel Calculator
- Gross Margin Calculator
- Heart Rate Zone Calculator
- Horsepower Converter
- Hourly Rate Calculator
- Ideal Weight Calculator
- Image Alt Text Helper
- Inches to Pixels
- Inflation Calculator
- Ingredient Ratio Calculator
- Interest Calculator
- Investment Calculator
- Jet Lag Calculator
- L/100km to MPG
- LCM Calculator
- LED Resistor Calculator
- Line Height Calculator
- Logarithm Calculator
- Lumber Calculator
- Macro Calculator
- Mailto Link Generator
- Markdown Cleaner
- Markdown Editor
- Markdown Link Generator
- Markdown Preview
- Markdown Table Generator
- Markdown TOC Generator
- Markup Calculator
- Median Calculator
- Mode Calculator
- Mortgage Calculator
- MPG to L/100km
- Mulch Calculator
- Net Margin Calculator
- Number Base Converter
- Ohm's Law Calculator
- Oven Temperature Converter
- Overtime Calculator
- Pace Calculator
- Package Version Comparator
- Packing Checklist Generator
- Paint Calculator
- Paper Size Converter
- Personal Loan Calculator
- Photo Print Size Calculator
- Pixels to Inches
- Power Calculator
- Pressure Calculator
- Prime Factorization
- Prime Number Checker
- Print Margin Calculator
- Print Size Calculator
- Probability Calculator
- Profit Margin Calculator
- Quadratic Equation Calculator
- Random Number Generator
- Ratio Calculator
- Recipe Portion Calculator
- Recipe Scaler
- Rectangle Calculator
- Resistor Calculator
- Resistor Color Code
- Resolution Calculator
- Retirement Calculator
- ROAS Calculator
- ROI Calculator
- Roofing Calculator
- Room Area Calculator
- RPM Calculator
- Running Pace Converter
- Salary Calculator
- Sales Tax Calculator
- Savings Calculator
- Scientific Calculator
- Semantic Version Comparator
- Simple Interest
- SIP Calculator
- Speed Calculator
- Square Root Calculator
- Stair Calculator
- Standard Deviation Calculator
- Tablespoons to Cups
- Text Readability Checker
- Tile Calculator
- Tip Calculator
- Tire Pressure Converter
- Tire Size Calculator
- Torque Calculator
- Travel Budget Calculator
- Triangle Calculator
- Trip Cost Calculator
- Trip Duration Calculator
- Unix Permissions Calculator
- US Letter Converter
- Variance Calculator
- VAT Calculator
- Voltage Calculator
- Volume Calculator
- Watt Calculator