What Is Area?
Mathematics · Measurement · Grades 3–5
Meaning at a glance
Area is the amount of flat surface a shape covers, measured in square units.
Also searched as: area of a rectangle, square units.
Understand it simply
Imagine covering a floor with square tiles. The number of tiles you need is the area. It is measured in square units, such as square centimetres (cm²) or square metres (m²).
For a rectangle you do not need to count every square. Multiply the number of squares in one row by the number of rows: area = length × width.
See it work
This rectangle is 5 units long and 3 units wide. There are 3 rows with 5 squares in each row.
A classroom floor is 6 m long and 4 m wide. Area = 6 × 4 = 24 square metres (24 m²).
Avoid this confusion
Area is not perimeter. Area is the space inside a shape and is measured in square units. Perimeter is the distance around the edge and is measured in ordinary units like cm or m. Think of grass inside a field (area) and the fence around it (perimeter).
Try it yourself
Work these out first, then check your answers below.
A rectangle is 7 cm long and 3 cm wide. What is its area?
A table top is 2 m long and 1 m wide. How many 1 m by 1 m tiles would cover it exactly?
A rectangle that is 4 cm by 6 cm and a rectangle that is 3 cm by 8 cm: which has the larger area?
Check your understanding
Show the answer to question 1
Answer: 21 cm²
Area = length × width = 7 × 3 = 21 square centimetres.
Show the answer to question 2
Answer: 2 tiles
Each tile has an area of 1 square metre. The table top has an area of 2 × 1 = 2 square metres, so it needs 2 tiles.
Show the answer to question 3
Answer: They have the same area.
4 × 6 = 24 cm² and 3 × 8 = 24 cm². Different shapes can have the same area.
Understand more with Courseversity
You now know what area means. Keep going with a full lesson, then explore the ideas that connect to it.
Learn
Learn this in a full lesson.
- Understanding area (Grade 3)
- Area of rectangles using arrays (Grade 3)
- Area of rectangles (Grade 4)
- Area (Grade 5)
Practise
Practise with Learning Lab questions for the lesson Understanding area (Grade 3), with an explanation after each answer.
Explore
Ideas that connect to this word.
- Perimeter: the distance around a shape, which people often confuse with area.
Save
Keep this word in My Study Dashboard so you can revise it later.
Keep building your understanding. Join Courseversity free to save this concept and continue learning.
Sources and review
- Illustrative Mathematics: Grade 3 geometric measurement (area and perimeter) – A published reference for how area and perimeter are commonly taught. Courseversity does not claim alignment with it.
Written by: Courseversity editorial team (AI-assisted draft).
Review status: checked against the sources above. Educator review is pending, so please tell us if anything looks wrong.
Last updated: 27 October 2026.