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Exponent Calculator

Raise any base to a power, take any root, and see negative exponents, with the answer also shown in scientific notation.

Exponent calculator

Result: —
Scientific notation: —
A negative exponent gives the reciprocal, so 2 to the power of −3 equals 0.125.

How to use the Exponent Calculator

  1. Choose whether you want a power or a root.
  2. Enter the base or radicand and the exponent or root index.
  3. Read the answer in plain form and in scientific notation.

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Frequently Asked Questions

Common questions about the free online exponent calculator.

Enter the base and the exponent with the power operation selected. For example base 2 and exponent 10 give the value 1024.
Choose the root operation, then enter the number and the root index. An index of 3 gives the cube root of the number.
A negative exponent means the reciprocal of the positive power, so 2 to the power of minus 3 equals 0.125 exactly.
Yes. A fractional exponent such as one half is the same as a square root, and the calculator accepts decimal exponents.
Even roots of negative numbers are not real numbers, so the tool reports that the result is undefined.
Yes. An odd root of a negative number is a real negative number, so the cube root of minus 8 is minus 2.
Any non-zero number raised to the power of zero equals one, which the calculator confirms instantly.
Raising zero to a negative power would require dividing by zero, and division by zero has no defined value.
No. All calculations run locally in your browser and the numbers you enter never leave your device.

Last updated: October 10, 2026