Rectangle Calculator
Calculate area, perimeter, and diagonal of a rectangle.
Results
Area:
Perimeter:
Diagonal:
What is this Online Rectangle Calculator for?
The Rectangle Calculator determines the Area, Perimeter, and Diagonal length of a rectangle given its length and width.
How does it work?
Area = L × W. Perimeter = 2 × (L + W). Diagonal = √(L² + W²) (Pythagorean theorem).