What does this tool do?
This power calculator raises a base to any exponent and shows the result instantly, while also computing its square, cube, square root, and cube root. It's a handy math tool for students, engineers, and anyone who needs quick exponentiation.
How to use it
- Enter your values into the fields.
- The result is calculated instantly.
- Read or copy the result.
Powers and roots on one screen
Enter a value in the base and exponent fields and the tool displays base-to-the-power-of-exponent in a large, clear figure. At the same time you see four extra results below: the square, cube, square root, and cube root of the base. The exponent can be decimal or negative, so you can compute things like 2 to the -3 or 9 to the 0.5 (a square root). Very large results automatically switch to scientific notation.
Frequently asked questions
Can I enter a negative or decimal exponent?
Yes. The exponent field accepts any number. A negative exponent inverts the result (2 to the -2 = 0.25), and a fractional exponent corresponds to a root (8 to the 0.5 ≈ 2.83).
Why can't I take the square root of a negative number?
The square root of a negative value is undefined in real numbers, so you'll see a dash in the square root cell. The cube root, however, works for negative bases; for example, the cube root of -8 is -2.
Why do very large results look like 1e+20?
When the result grows very large, the tool switches to scientific notation to stay readable. 1e+20 means the digit 1 followed by 20 zeros.
Is Power & Root Calculator free?
Yes. Power & Root Calculator and all 300+ tools on MagmaNex are completely free with no signup or account required.
Is my data safe?
Yes. Everything runs locally in your browser. The data you enter is never sent to a server, stored, or shared.
Does it work on mobile?
Yes. Power & Root Calculator works on phones, tablets and desktops — no app download needed.
🔒 Privacy: everything runs in your browser, your data is never sent to a server.