Welcome to That Calculator

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.

The due date calculator (also called a pregnancy calculator) helps answer the question: "When is my baby due?" Our tool estimates the due date for your baby's birth.

An atom's mass comes from the tiny particles called protons, neutrons, and electrons. However, electrons don't add much to the mass because they are 1,836 times lighter than protons.

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.

Have you ever wondered how to switch between centimeters (cm) and inches (in)? This calculator will help you do the maths with ease.

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 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.

Do you want to convert Months to Years? Our Months to Years calculator is the perfect tool for converting from months to years and years to month.