All Calculators
Browse our full collection of free online calculators. All tools run entirely in your browser.
28 Calculators — 100% FreeFinance
10Compound Interest Calculator
Calculate future value with compound interest over time.
Loan Calculator
Monthly payments, total interest, and amortization for any loan.
Mortgage Calculator
Home loan payments with down payment and interest rate.
Rent vs Buy Calculator
Compare total cost of renting versus buying a home over time.
Auto Loan Calculator
Car loan payments with down payment and trade-in value.
ROI Calculator
Return on investment with annualized ROI.
Margin & Markup Calculator
Profit margin, markup percentage, and selling price.
Salary Calculator
Convert between hourly, weekly, monthly, and annual salary.
Tip Calculator
Split bills and calculate tips for any group size.
Discount Calculator
Find the final price after single or stacked discounts.
Health & Life
5BMI Calculator
Body Mass Index with WHO health categories.
BMR Calculator
Basal Metabolic Rate via Mifflin-St Jeor equation.
TDEE Calculator
Total Daily Energy Expenditure and calorie goals.
Body Fat Calculator
Body fat percentage using the US Navy method.
Age Calculator
Exact age in years, months, and days from your birthdate.
Unit Conversion
8Fahrenheit ↔ Celsius
Temperature conversion between °F, °C, and Kelvin.
Inch ↔ CM
Length conversion: inches, cm, meters, feet, mm.
Pound ↔ KG
Weight conversion: pounds, kilograms, stones, ounces.
MPG (Gas Mileage)
Fuel economy: MPG (US), MPG (UK), L/100km.
Cooking Converter
Cups, tablespoons, teaspoons, fl oz, ml, L.
Shoe Size Converter
US, UK, EU, JP, CM for men and women.
Unit Converter
Length, weight, and temperature conversions.
Percentage Calculator
3-in-1 percentage calculations for any scenario.
Everyday Tools
5Date Calculator
Date difference and add or subtract days from a date.
Time Between Dates
Days, weeks, months, business days between dates.
Age Difference Calculator
Exact difference between two people's birthdays.
GPA Calculator
Calculate your college GPA with dynamic course list.
Password Generator
Generate secure random passwords with custom options.