Welcome to That Calculator

We are here to help you Calculate with ease, and find 'that calculator' you need!
From simple math to complex calculations, we've got you covered.


Popular calculators

Check out some of our popular calculators.

SQ FT to Acre Converter

Our acres to square feet converter is the simplest way to convert acres into square feet and vice versa.

Age in Years Calculator

Our age in years calculator can find a person's age from their birthday. Simply enter their birthday and we'll tell you how old they are.

Percentage Calculator

Our percentage calculator is the perfect tool to calculate what percent of X is Y, find the total based on a value and percentage, or determine the value based on the total and percentage.

Days Until Calculator

Tired of manually counting the days until your special event? Don't worry, our days until calculator is here to make your life easier. This handy tool will tell you exactly how many days are left until your big day, whether it's a birthday, holiday, or important deadline.

Gallons to Cubic Feet Converter

Our gallons to cubic feet converter allows you to convert cubic feet to gallons quickly. It's a simple tool for anyone who needs to convert cubic feet to gallons.

Circumference Calculator

Our circumference calculator is here to help you find the circumference of a circle. With this tool, you can find the circumference using a diameter or a radius.

Metres to Feet Converter

Our Metres to Feet converter is a handy tool that helps you convert lengths from Metres (m) to feet (ft) or vice versa.

Days Between Dates Calculator

Our Days Between Dates Calculator helps you figure out how many days lie between two different dates. Are you wondering how much time has passed since an important event happened? Or maybe you need to know how many days remain until an upcoming occasion?


At ThatCalculator.com, our mission is to provide a one-stop hub for all your calculation needs. We believe that everyone deserves easy access to tools that make calculations simple and efficient. Learn more


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