Square Calculator
Compute area, perimeter, diagonal and inradius of a square from its side length.
Inputs
units
Area
64.0000sq units
Perimeter
32.0000units
Diagonal
11.3137units
Inradius
4.0000units
Step by step
Area
A = 8²
= 64
Perimeter
P = 4 × 8
= 32
Diagonal
d = 8 × √2
= 11.3137
How it works
A square has all four sides equal and all angles 90°. Its diagonal is s√2 and its inradius (inscribed circle radius) is s/2.
Formulas
Area
A = s²
- s
- Side length
Diagonal
d = s√2
- s
- Side length
Frequently Asked Questions
What is the relationship between diagonal and side?
The diagonal is always √2 ≈ 1.414 times the side length.
How do I find the side from the area?
Take the square root of the area: s = √A.