Square root of 123

√123 ≈ 11.0905

√123 is an irrational number, so its decimals never end or repeat. It sits between 11 and 12 because 11² = 121 and 12² = 144.

√123 rounded

Simplest radical form

123 has no perfect-square factor other than 1, so √123 is already in simplest radical form.

Check the answer

11.0905 × 11.0905 ≈ 122.9992, which is very close to 123.

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Square roots near 123

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