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.

Area of a Triangle Calculator

Our Area of Triangle calculator is a quick and easy way to calculate the area of a given triangle using its Base and Height, Three Sides, Two Sides and Included Angle, or Two Angles and Included Side.

Point Slope Form Calculator

Our point-slope form calculator is a handy tool for finding the equation of a line from a point on that line and the line's slope. Our calculator shows the equation in point-slope form and slope intercept form.

BMI Calculator

This tool is perfect for finding a ratio of weight to height and returning a single number. Our BMI calculator shows your BMI and the weight you need to lose if you are overweight.

Grams to Ounces Calculator

The grams to ounces converter is a handy tool that allows you to switch between grams and ounces easily. It can convert grams to ounces or ounces to grams, depending on your needs.

Percentage Decrease Calculator

Our percentage decrease calculator will help you calculate the percentage decrease between two values.

Circumference and Area of a Circle Calculator

Our Circumference and Area of a Circle Calculator is the best tool for finding the Circumference and Area of a Circle.

Hours to Days Calculator

Our hours to days calculator is a quick and easy way to convert hours to days and vice versa. If you have been looking for a simple way to convert hours to days or days to hours, this calculator is for you.

Time from Date Calculator

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.


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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