Calculator Tools

Quick, private calculators that run right in your browser — nothing uploaded.

12 tools found

Calculate your Body Mass Index in metric or imperial units — instant result and category, in your browser.

Work out percentages fast — X% of a number, what percent one is of another, percent change, add/subtract a percent. In your browser.

Find your exact age in years, months, and days — plus days lived, next birthday, and the weekday you were born. In your browser.

Estimate a loan's monthly payment, total interest, and total cost from the amount, rate, and term. In your browser.

Work out the tip and total on a bill, and split it evenly between people — any tip percentage and currency. In your browser.

Calculate your GPA on the 4.0 scale — add courses, pick letter grades, and enter credit hours. In your browser.

Calculate the hours and minutes between a start and end time — handles overnight shifts and breaks, with decimal hours for pay. In your browser.

Add and subtract time in hours, minutes, and seconds, or add a duration to a time of day. In your browser.

Add sales tax to a price or remove it from a tax-included total — enter your own rate, any currency. In your browser.

Convert length, weight, temperature, volume, area, speed, time, and digital storage units instantly. In your browser.

A free online stopwatch with lap times — accurate, drift-free timing that runs in your browser.

Convert a date and time between timezones with daylight saving handled automatically — see the day and date in each zone. In your browser.