Area of a Rectangle Calculator
Rectangle area is length × width. Perimeter is 2 × (length + width). Use the same units for both sides.
Area84
Perimeter38
Formula
A = l × w. P = 2(l + w).
How to use this calculator
- Enter length and width.
- Read area and perimeter.
Examples
12 by 7
Area 84. Perimeter 38.
FAQ
Does this work for squares?+
Yes. Set length equal to width.
Related tools
CalculatorArea of a Circle CalculatorCompute circle area and circumference from radius or diameter.CalculatorArea of a Triangle CalculatorFind triangle area from base and height, or from three sides (Heron).CalculatorVolume of a Cylinder CalculatorFind cylinder volume and lateral area from radius and height.CalculatorVolume of a Sphere CalculatorCompute sphere volume and surface area from radius.CalculatorPythagorean Theorem CalculatorSolve for hypotenuse or a leg of a right triangle.CalculatorPercentage Change CalculatorMeasure percent increase or decrease from an old value to a new value.CalculatorRatio CalculatorSimplify a ratio A:B and scale it to a target part.CalculatorAverage CalculatorFind the mean of a list of numbers separated by commas.