Spike's Calculators
Area and Perimeter
Rectangle
Calculate the area and perimeter of a rectangle. This calculator uses feet and or inches for measurements.
Rectangle = a four-sided shape with the opposite sides running parallel to each other and four 90° corners.
Rectangle Area and Perimeter
Calculation
- length in feet and or inches
- width in feet and or inches
- decimal precision, the number of digits after the decimal point
Results
- the length of the diagonal in decimal feet
- the area of the rectangle in decimal square feet
- area in square feet and inches
- the area in decimal square inches
- the area in square inches
- the area in square metres
- the perimeter of the rectangle in decimal feet
- the perimeter in lineal feet and inches
- the perimeter in decimal inches
- the perimeter in inches
- the perimeter in metres
Formula
A = ab P = 2(a+b) where A is the area of the rectangle a is the length b the width P the perimeter of the rectangle
Conversions
one square foot ( ft²) = 144 square inches (in²) one square inch (in²) = 0.00694444444444443 square feet (ft²) one square foot ( ft²) = 0.09290304 square metres (m²) square inch (in²) = 0.00064516 square metres (m²)