US Standard Area

These are the most common measurements:

Small surfaces are usually measured in square inches, rooms and buildings in square feet, carpet in square yards, property in acres, and territory in square miles.

 

square inch

Square Inch

Area is length by length, so a square inch is a square that is 1 inch on each side.

The Unit is inch × inch, which can be written many ways, such as:

Square Foot

Ariel the dog next to square foot

A square foot is a square that is 1 foot on each side.

Here Ariel the Dog sits next to a square foot made with tape measures.

The Unit is foot × foot, which can be written many ways, such as

Square Yard

A square yard is a square that is 1 yard on each side. It is equal to 9 square feet.

Acre

land area

One acre is equal to 43,560 square feet.

It is roughly equal to a football field in area.

It is exactly the area 66 ft by 660 ft.

Or 198 ft by 220 ft.

Acres are commonly used to measure land.

 

Square Mile

A square mile is a square that is 1 mile on each side.

Square miles are commonly used to measure large areas of land.

 

More Examples

A square inch is about:

An acre is:

A square mile is:

 

 
Garden Area Activity