Square roots·√91
√91 =
√91
≈ 9.539392

Square root of 91 — 9.539392 (√91)

Irrational

The square root of 91 is about 9.539392, or exactly √91. It lies between 9 and 10.

As a decimal
≈ 9.539392
Simplified surd
√91 = √91
Between
9 < √91 < 10
Squared
91² = 8281
Cube root
∛91 ≈ 4.497941

Nearby numbers

√88 = 2√22√89 = √89√90 = 3√10√92 = 2√23√93 = √93√94 = √94

From 1 to 200

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How to read this

  • The decimal is rounded; the surd form is the exact value.
  • Pulling out a square factor simplifies the surd — √50 = 5√2.
  • If the number is not a perfect square, the decimal never ends (irrational).
  • Knowing which two integers it sits between is enough to estimate in your head.

Frequently asked questions

Q. What is the square root of 91?

About 9.539392, or exactly √91.

Q. Can the surd be simplified?

No — there is no square factor to pull out.

Q. Between which integers does it fall?

Between 9 and 10.

Q. What is the cube root of 91?

About 4.497941.