CALCULATOR
Diagonal of a Square Calculator
Find square diagonal from side. Example: Side: 2 m gives 2.82842712475 m. All sides equal with right angles. Flat Euclidean geometry; enter stated meter measurements. No material thickness, waste, structural recommendation or curved earth. Display rounding does not change calculation.
All sides equal with right angles. Flat Euclidean geometry; enter stated meter measurements. No material thickness, waste, structural recommendation or curved earth. Display rounding does not change calculation. Derivation: Pythagoras d²=s²+s².
Accepted inputs: Side: 0.001 to 1,000 m.
How the calculation works
diagonal = side √2
Worked example
With side 2 m, square diagonal from side is 2.828427125 m.
Assumptions and limits
All sides equal with right angles. Flat Euclidean geometry; enter stated meter measurements. No material thickness, waste, structural recommendation or curved earth. Display rounding does not change calculation. Derivation: Pythagoras d²=s²+s².