What is the square root of 123?

Answer

11.090537

123 is not a perfect square11.090537² = 11.090537² ≈ 12311.090537 × 11.090537 = ≈ 123

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How We Calculated This

√n — the number which, multiplied by itself, equals n

√123 = 11.090537

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What is the square root of 1?1 (exact)What is the square root of 2?1.414214 What is the square root of 3?1.732051 What is the square root of 4?2 (exact)What is the square root of 5?2.236068

Calculated using verified formulas. Last updated March 2026.