Exponent calculator
Solve xⁿ = y for any missing piece: a power, a root, or the exponent itself.
How it’s worked out
- Rule
Questions people ask
What does a negative exponent mean?
A negative exponent means “one over”: x−n = 1 ÷ xn. So 2−3 = 1/8 = 0.125.
What does a fractional exponent mean?
A fractional exponent is a root: x1/n is the nth root of x, and xm/n is the nth root of x to the power m. So 82/3 = 4.