Square Calculator: Area, Perimeter and Diagonal

Your details

Select which measurement you already have.
All results are expressed in this unit (and its square for area).
The length of one side of the square.
m
Side (a)
5m

Length of one side of the square

Area (A)25m²
Perimeter (P)20m
Diagonal (d)7.0711m

Side length 5.0000 gives an area of 25.0000 and a diagonal of 7.0711.

  • The area (25.0000) is the square of the side: multiply the side by itself.
  • The perimeter (20.0000) equals exactly 4 times the side length.
  • The diagonal (7.0711) is the side multiplied by the square root of 2, roughly 1.4142.
  • For any square the diagonal is always 0.3536 times the perimeter, which equals sqrt(2) / 4.

Next stepTo find how many squares tile a rectangle, divide the rectangle's area by this square's area. To find how many squares fit in a row, divide the rectangle width by the side length.

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