Area of a Rectangle
Calculate Area of a Rectangle instantly. Free online calculator with the exact formula, a worked example, and metric units. No signup required.
Area of a Rectangle
Side am
Side bm
Rectangle area
24m²
Perimeter
20m
Diagonal
7,2111m
a × b
6 × 4
Area
24m²
More about: Area of a Rectangle
What it calculates
The “Area of a Rectangle” calculator computes Rectangle area in m² from 2 parameters: side a (m), side b (m).
A core calculation for studying, engineering tasks, and checking solutions.
Example calculation
With parameters Side a = 6 m, Side b = 4 m the result is 24 m² (a × b).
How to use
- Enter the parameter values — every field above is adjustable with a slider.
- The result and related metrics are calculated automatically as you type.
- Use the additional metrics shown (if any) where needed.
- Copy the result or bookmark the page.