Volume of a Cylinder Calculator

This calculator finds the volume of a right circular cylinder when the radius (or diameter) and height are known.

1. Select if you want to use the radius or diameter (default is radius).
2. For the value, you can choose a whole number, decimal or fraction.
   • You can type a fraction by typing the numerator then '/' then the denominator.
   • You can type a mixed number by typing the whole-number part, then a space then the fraction part.
   • Examples: 2 1/2 (two and one-half); 3 4/5 (three and four-fifths); 7 1/3 (seven and one-third).
3. Choose your units of measurement (default is none)
4. Choose your desired accuracy (default is 2 decimal places)
5. Click the Find Volume button
6. You will be given two answers for the area, one in terms of Pi (π) and the other answer as a decimal value.

If you would like to see where the formula comes from, then we hope you will find the explanation below useful.

We going to look at a closed right circular cylinder and work out the volume.

The volume of a cylinder is the amount of space inside the cylinder.

To find the amount of space inside the cylinder, we need to find the area of the circular base and multiply this amount by the height.

The area of the circular base of the cylinder is: \[ A = \pi r^2 \] where A is the area and r is the radius of the circle.

The height of the cylinder is h.

This means that the volume of the cylinder is: \[ V = \pi r^2 h \]

Volume of a Cylinder Example 1

Find the volume of the cylinder below to 1 decimal place.

The formula for the volume of a cylinder is: \[ V = \pi r^2 h \]

If we substitute the values of the radius and height into this equation, we get: \[ V = \pi \cdot 4^2 \cdot 6 = \pi \cdot 16 \cdot 6 = 96 \pi \]

This gives us a final answer of: \[ V =301.6 \;\ cm^3 \; to \; 1 \; decimal \; place \]

Volume of a Cylinder Example 2

Find the volume of the cylinder below to 1 decimal place.

The formula for the volume of a cylinder is: \[ V = \pi r^2 h \]

As the cylinder is lying on its side, the actual 'height' of the cylinder is 6 ft and the radius is 2 ½ ft

If we substitute the values of the radius and height into this equation, we get: \[ V = \pi \cdot (2 {1 \over 2})^2 \cdot 6 = \pi \cdot {25 \over 4} \cdot 6 = {75 \over 2} \pi \]

This gives us a final answer of: \[ V = 117.8 \;\ ft^3 \; to \; 1 \; decimal \; place \]

Volume of a Cylinder Example 3

Find the volume of the cylinder below to 2 decimal places.

We have been given the diameter instead of the radius. To find the radius, we just need to halve the diameter.

So the radius of the circular base is: \[ r = 9.4 \div 2 = 4.7 m \]

The formula for the volume of a cylinder is: \[ V = \pi r^2 h \]

If we substitute the values of the radius and height into this equation, we get: \[ V = \pi \cdot 4.7^2 \cdot 5.7 = \pi \cdot 22.09 \cdot 5.7 = 125.913 \pi \]

This gives us a final answer of: \[ V = 395.57 \;\ m^3 \; to \; 2 \; decimal \; places \]

We have created two worksheets to help you practice this skill.

The first sheet involves working out the volume of a range of cylinders where the radius is given.

The second sheet involves working out the volume of cylinders where either the radius or diameter is given.

You can check your answers to the questions on the sheets using our volume of a cylinder calculator.

Here is our range of volume worksheets.

Using these sheets will help your child to:

• know what volume is and how to find it;
• find the volume of simple shapes by counting cubes;
• find the volume of rectangular prisms (cuboids);
• solving basic problems involving volume

This calculator works in the same way as the one above, but finds the volume of a pipe (which is basically an open cylinder).

The main difference is that this calculator can cope with different units of measure and you can convert the volume into liters, gallons, or fluid ounces, as well as cm³, m³, etc

This calculator works in the same way as the one above, but finds the surface area of the cylinder instead of the volume.

We have a range of area and volume calculators to help you find the area and volumes of a range of different 2d and 3d shapes.

Each calculator page comes with worked examples, formulas and practice worksheets.

The Math Salamanders hope you enjoy using these free printable Math worksheets and all our other Math games and resources.

We welcome any comments about our site or worksheets on the Facebook comments box at the bottom of every page.