Free Online Calculators

Fast, free, and private. All calculations happen in your browser — no data is ever sent to a server.

100% Browser-Based — No Sign-Up Required

Finance

Calculate future value with compound interest

Monthly payments, total interest for any loan

Home loan payments with down payment

Convert between hourly, monthly, annual salary

Split bills and calculate tips easily

Find final price after discounts

Car loan payments with trade-in value

Return on investment and annualized ROI

Profit margin, markup, and selling price

Body Mass Index with health categories

Exact age in years, months, and days

Daily calorie needs based on activity level

Body fat % using US Navy method

3-in-1 percentage calculations

Length, weight, and temperature conversions

Date difference and add/subtract days

Calculate your college GPA

Generate secure random passwords