Free Online Calculators

Quick, accurate calculators for everyday math. No signup, no clutter — just results.

All Calculators

16 free tools and counting — all run in your browser, no data stored.

Calculate tip amount and split the bill between any number of people.

Percentage Calculator

Find any percentage of a number, percentage change, or reverse percentage.

Find your exact age in years, months, days, hours, and more.

Calculate your Body Mass Index with metric or imperial units.

Calculate semester GPA and cumulative GPA from grades and credit hours.

Loan Calculator

Monthly payments, total interest, and full amortization schedule.

Split Calculator

Split bills evenly, by percentage, or with custom amounts per person.

Random Number Generator

Cryptographically secure random numbers, dice rolls, and coin flips.