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Tools / Root, power & logarithm calculator

Root, power & logarithm calculator

Enter a number x and an exponent or base n. The calculator shows roots, powers and logarithms at once.

✓ Free · ✓ no sign-up · ✓ no cookies · ✓ runs in your browser

√x (square root)
–

n-th root = x^(1/n); logₙ(x) = ln(x) ÷ ln(n). Roots of negative numbers only exist for odd n; logarithms only for x > 0.

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🔒 Runs entirely in your browser – nothing you enter is uploaded or stored.

How to use it

  1. Enter x.
  2. Enter n (e.g. 3 for the cube root or base 3).
  3. Read all results in the table.
Your inputs live only in the link, not on our server.

Last checked: October 2026. Found a mistake? Use the form below – we fix confirmed errors and update the date.

Frequently asked questions

How do I calculate the n-th root?

Raise x to the power 1/n: the 4th root of 81 = 81^(1/4) = 3.

What is the difference between log and ln?

log usually means base 10, ln the natural logarithm to base e ≈ 2.718.

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