What is the square root of 129?

Answer

11.357817

129 is not a perfect square11.357817² = 11.357817² ≈ 12911.357817 × 11.357817 = ≈ 129

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How We Calculated This

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

√129 = 11.357817

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Calculated using verified formulas. Last updated March 2026.