Square Side from Diagonal Table: Side length by Diagonal
Reference table of side length for Square Side from Diagonal across a range of diagonal values — exact, engine-computed figures you can read off at a glance.
Square Side from Diagonal Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Side length
7.071068
- Area
- 50.0000
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Square Side from Diagonal Calculator
The Square Side from Diagonal Calculator works out your side length, along with 1 related figure in an instant. Enter diagonal and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the diagonal.
- Read off your side length, together with area — the calculator updates automatically, with no button to press.
Formula
The Square Side from Diagonal Calculator uses the formula:
Side length = Diagonal ÷ √(2)
Worked example
For example, with diagonal of 10, the side length is 7.071068.
| Diagonal | 10 |
|---|
| Side length | 7.071068 |
|---|---|
| Area | 50.0000 |
Results are estimates for educational use, not professional advice.
Key terms explained
- Area
- The amount of two-dimensional space a shape covers, measured in square units.
Frequently asked questions
Divide the diagonal by √2. A diagonal of 10 gives a side of about 7.07.
Use diagonal² ÷ 2. A diagonal of 10 gives an area of 50.
The diagonal of a square is side × √2, so dividing reverses it.
Yes, about 1.414 times the side for any square.
The Square Side from Diagonal Calculator uses the formula: Side length = Diagonal ÷ √(2). For example, with diagonal of 10, the side length is 7.071068.
Enter the diagonal. Read off your side length, together with area — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Square Side from Diagonal: Formula, Steps & Examples
Learn how to calculate Square Side from Diagonal — the formula explained step by step, with worked examples and a free calculator to check your answer.