Rectangle Area and Diagonal
Calculate rectangle area, perimeter and diagonal from two side lengths.
Your numbers
Area
Use consistent units. The result follows the assumptions you enter.
Scenario comparison
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Formula
A=lw; P=2(l+w); d=√(l²+w²)
Calculate rectangle area, perimeter and diagonal from two side lengths.
Worked example
- Length (m)
- 3
- Width (m)
- 4
- Area
- 12 m²
- Perimeter
- 14 m
- Diagonal
- 5 m
Scope and limitations
Use consistent units. The result follows the assumptions you enter.
Inputs are checked for missing values and allowed ranges. A result outside the finite numeric range is not displayed. Rounding affects display, while the calculation uses the model’s numeric precision.
Check your units and assumptions before relying on a result. Changing a label does not convert a currency or physical unit.
Formula version: 325ddfbb618b · Example checked: