Loona Calculators
Powers made simple: enter a base and any exponent — including fractions and negatives — and get the result, plus a handy table showing the base's square, cube and roots.
An exponent of 0.5 is the square root, and 1/3 is the cube root — fractional powers are roots in disguise.
It flips the number into a fraction: 2^-2 = 1 / (2 × 2) = 0.25. The result gets smaller; the exponent's sign never makes the answer negative by itself.
A negative base with a fractional exponent (like -4^0.5) has no real-number answer, so the calculator reports that honestly instead of inventing a value.