Calculate a rectangle area or find a missing side. Optional links route material-specific work to the appropriate calculator.
Square meters = length × width.
m
m
m²
m
Result
What are you measuring?
| Example | Result |
|---|---|
| 5 m × 4 m | 20 m² |
| 10 m × 3 m | 30 m² |
| 20 m² ÷ 4 m | 5 m |
Describe the task to the AI assistant and continue from the result.
Open AI assistant →Simple rectangle area
Multiply length by width to get square metres. If area and one side are known, divide area by that side.
Choose the next tool only when needed
Tile, concrete, gravel and decking calculations need additional inputs. The route block links to those specialist calculators without delaying the basic result.
Important limit
This page calculates geometry only and does not assume openings, waste, material density or structural requirements.