What is the square root of 78?

Answer

8.831761

78 is not a perfect square8.831761² = 8.831761² ≈ 788.831761 × 8.831761 = ≈ 78

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How We Calculated This

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

√78 = 8.831761

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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.