Skip to main content

What is the square root of 20?

Answer
4.472136
20 is not a perfect square4.472136² = 4.472136² ≈ 204.472136 × 4.472136 = ≈ 20

Need a custom calculation?

Open the full calculator with custom inputs

Calculate

How We Calculated This

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

√20 = 4.472136

Related Calculations

What is the square root of 1?1 (exact)What is the square root of 2?1.414214What is the square root of 3?1.732051What 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.