Rectangle area
Calculate the area of a rectangle from its length and width. See the multiplication formula, input units and a worked example.
Inputs
Use the units shown—
Enter your values and select Calculate.
Formula & explanation
A = length × width
Variables & units
- Length
- cm · minimum 0, maximum 1000000000
- Width
- cm · minimum 0, maximum 1000000000
Worked example
An 8 cm by 5 cm rectangle has an area of 40 cm².
Assumptions
Keep both dimensions in centimetres; area is measured in square centimetres.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
Use the default input values to find the answer. The reset icon restores those values.
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