Spike's Calculators

Calculate the area and perimeter of a square. This calculator uses feet and or inches for measurements.

Square = four equal sides and four 90° angles.

- the side length in feet and or inches
- decimal precision, the number of digits after the decimal point

- the length of the diagonal
- the area of the square 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

A = s² P = s4 where A is the area of the square s the length of one of the sides P the perimeter of the square

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)