√426 = 20.6397674406. 426 is not a perfect square; the result is irrational.

Is 426 a perfect square?

No, 426 is not a perfect square. Its square root is irrational.

What is 20.6397674406 squared?

20.6397674406 squared is approximately 426. (20.6397674406)² ≈ 426

Instant answer with step-by-step solution

√426 = 20.6397674406

√426 = 20.6397674406

⚠ 426 is not a perfect square — result rounded to 10 significant figures

We need to find √426 — a number that when multiplied by itself equals 426.
426 is not a perfect square. Its square root is irrational.
It falls between √400 = 20 and √441 = 21.
Using the formula √N = N^(1/2): √426 = 426^0.5 = 20.6397674406
Verification: 20.6397674406 × 20.6397674406 ≈ 426 ✓ (rounded to 10 significant figures)

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