How to find volume

How to find volume

What is volume?

Volume measures how a whole lot of space an object occupies. occasionally you would possibly pay attention to questions like "what is the capability of a box?" or "how plenty can the box keep?" you could assume that these questions will want a quantity to be calculated.


Observe: To be absolutely smart, extent and capacity are not always equal - think of a box with truly thick facets!

Calculate the Volume

Volume is measured in cubes (or cubic units).

illustration of a cuboid

How many cubes are in this rectangular prism (cuboid)?

We will be counted the cubes although it is faster to take the duration, width, and peak and use multiplication. The square prism above has a quantity of 48 cubic gadgets.

The volume of a rectangular prism is = length x width x height

Examples of calculating the area of a rectangle

We want to do multiplications to training sessions the extent. We calculate the place of one face (or side) and multiply that by using its height. The examples underneath show how there are 3 ways of doing this.

Note how we get the equal solution regardless of what facet we use to discover an area.


When your infant begins running with vicinity and perimeter he or she will generally work with 2 dimensions - squares, rectangles, triangles, and so on. which can be proven on paper as flat - there's no intensity or third measurement. operating with quantity does contain three dimensions. make certain your toddler is aware of this and does now not think of the cubes, and other 3-d shapes shown on paper as just being another "form at the web page." show them real containers, and show how those may be drawn (or represented) on a two-dimensional piece of paper. In different phrases, make sure the relationship between what is on paper and what it represents within the actual global is made.


Make certain your baby is not harassed with the aid of the usage of quantity as used when speaking about loudness.

Units for measuring volume

There are very big differences between units of dimension for volume. for example, there are a hundred centimeters in 1 meter however there are 1,000,000 (yes, 1 million) cubic centimeters in a cubic meter.

The volume of a cube

Why the big distinction? because in volume we've got not just duration; we have duration, width, and peak. The sugar cube instance below suggests this.

How a lot of sugar? 1 m3 or a 1000000 cm3

think of filling a completely big field (it'd be 1 meter wide, 1 meter, lengthy, and one meter high) with sugar cubes (with every facet 1 centimeter).

Step 1: one row along the bottom of the box -

That would be 100 sugar dubstep 2: cover the rest of the base of the box -

that would give a total of 100 rows each with

100 sugar cubes. 100 x 100 = 10,000 sugar

cubes at the bottom of the big box.Step 3: Repeat this 99 times until there are

layers of 10,000 cubes stacked 100 deep.

10,000 x 100 = 1,000,000 sugar cubes

There are 1,000,000 cm3 in 1 m3 - be careful not to have too much sugar!

There are other units for measuring volume; cubic inches, cubic feet, cubic yards are all units used for measuring volume. Milliliters, liters, gallons are also used especially when measuring liquids.

Don't forget the wee 3We write cubic sizes using a small 3 next to the unit.

We write mm3, cm3, m3, km3, cm3

We can say "85 centimeters cubed" or "85 cubic centimeters"

Examples of Calculating Volume of Rectangular Prisms

Volume = Length x Width x Height

Volume = 12 cm x 8 cm x 6 cm

= 576 cm3Volume = Length x Width x Height

Volume = 20 m x 2 m x 2 m

= 80 m3Volume = Length x Width x Height

Volume = 10 m x 4 m x 5 m

= 200 m3

Volume of a Cylinder

Calculating the volume of a cylinder involves multiplying the area of the base by the height of the cylinder. The base of a cylinder is circular and the formula for the area of a circle is: area of a circle = πr2. There is more here in the area of a circle.

Volume = Area of base x Height

Volume = πr2 x h

Volume = πr2 h

Note: in the examples below we will use 3.14 as an approximate value for π (Pi).

Example of Calculating the Volume of a Cylinder

Dimensions are in cm.Volume = πr2 h

Volume = 3.14 x 3 x 3 x 8

Volume = 226.08 cm3

Volume of a Cone

The volume of a cone is equal to one-third the volume of a cylinder with matching height and area of the base. This gives the formula for the volume of a cone as shown below.

Volume = 1/3 πr2h

Example to Find the Volume of a Cone

Dimensions are in cm.Volume = 1/3 πr2 h

Volume = 1/3 x 3.14 x 2 x 2 x 7

Volume = 29.31 cm3

Volume of a Sphere

The formula for the volume of a sphere is shown below.

Volume = 4/3 πr3

Example of Calculating the Volume of a Sphere

Dimensions are in cm.Volume = 4/3 πr3

Volume = 4/3 x 3.14 x 4 x 4 x 4

Volume = 267.95 cm3

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