Square root of 80

√80 ≈ 8.9443

√80 is an irrational number, so its decimals never end or repeat. It sits between 8 and 9 because 8² = 64 and 9² = 81.

√80 rounded

Simplest radical form

80 = 16 × 5 and √16 = 4, so √80 = 4√5.

Check the answer

8.9443 × 8.9443 ≈ 80.0005, which is very close to 80.

Need another number? Use the square root calculator (also cube roots and other roots).

Square roots near 80

All square root answers · Exponent calculator