Welcome to That 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.

That Calculator Fahrenheit to Celsius temperature Converter is the best tool for converting between Fahrenheit and Celsius temperature.

Calculating the duration between two times can be tricky depending on the number of minutes and seconds in the two times being compared. Our Time from Date Calculator will make this easy for you.

Welcome to our miles to Kilometers converter, a tool that quickly converts miles to km and km to miles. Miles and kilometers are both units used to measure distance, but they are not the same.

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.

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.

Our Bar to Psi converter is the perfect tool to convert pressure from bar to psi or vice versa quickly.

Our gradient calculator is the perfect tool for finding the gradient of a line from two points on that line. Our calculator shows the rise, run and gradient.