Rectangle Perimeter Calculator
P = 2(l + w). Length plus width, doubled.
Result
Perimeter
32.0000
2 × (10 + 6).
- Length10
- Width6
- Perimeter32.000000
- Area60.000000
- Diagonal11.661904
Step-by-step
- P = 2(l + w) = 2(10 + 6) = 32.0000.
- Area = 10 × 6 = 60.0000.
- Diagonal = √(l² + w²) = 11.6619.
How to use this calculator
- Enter length and width.
- Read perimeter, area, and diagonal.
About this calculator
A rectangle's perimeter is the sum of all four sides: P = 2(l + w). Useful for fencing, picture-framing, room baseboards, or anything that traces the boundary of a rectangle. The formula is symmetric — swap length and width without effect. Area scales differently (l × w), so a square (l = w) gives the maximum area for a given perimeter.
Frequently asked
Yes — when l = w. Perimeter formula reduces to P = 4s.
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