Calculate the volume of a cylinder

Calculate the volume of all common geometrical shapes, such as cubes, spheres, pyramids, cones etc.

Calculate the area of all common geometrical shapes, such as circles, triangles etc.

Calculate the volume of a sphere (such as the earth, a marble) using many different dimensions for both input and output.

Calculate the volume of a cube or brick (such as a dice or an iPhone) using plenty of different input measurements and get the volume in any dimension you want.

Calculate the volume of a pyramid with a four-sided bases (such as, well, the pyramids!) using several different dimensions for both input and output.

Calculate the volume of a cone (such as an ice cream cone), it allows multiple different types of inputs and outputs - depending on your need.

Calculate the volume of a cylinder (such as a beer can or a hose) using many different dimensions for both input and output.

The surface area is the surface part of a three-dimensional object. You can use these calculations to determine that here.

Use this calculation to calculate the area of a square or a rectangle.

This calculation will calculate the area of a circle using either the diameter, the radius or the circumference as input.

Calculate the area of a (right-angled) triangle with this calculation.

How much space do we have to live on, on planet Earth? Calculate this and many other things in this calculation for surface area for spheres.

With this calculation you can calculate the surface area of a cone.

Use this calculation to calculate the surface area of cubes and bricks.

Ever wondered how much you would have to paint if you were to repaint the pyramids? No? Well, you can calculate surface areas of pyramids (with four-sided bases) here if you ever find the need.

If you would unfold a cylinder it would become a rectangle. Calculate the surface area of a cylinder (i.e. that rectangle) here.

Percentage is a very common calculation that is sometimes a bit tricky to understand. Here you get help to calculate the most common percentage calculations.

Enter how much alcohol you drank and get an estimate of how much time you have to wait until you are sober again.

Compound interest is interest upon interest that will build up to create great wealth (or debt!) over time. This calculation will help you calculate how much you will gain through compound interest.

Convert between shoe sizes in different countries and different shoe size systems with this simple converter.

Find out when you are most likely to ovulate, not just next time but also in the up-coming months.