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Log base change

Change-of-base formula ln(x)/ln(b).

Client
log_2(8) ≈ 3.000000

Nearby workflows on Toolcore

  • Logarithm calculator — Compute log_b(x) for any valid base and value—natural, base-10, or custom—in your browser. when units or numeric output should be checked on a related calculator.
  • Math expression evaluator — Evaluate basic + − × ÷ arithmetic with parentheses in your browser—no variables. when units or numeric output should be checked on a related calculator.
  • Percentage calculator — Percent of a value, ratio to percent, and percent change—no server round-trip. when units or numeric output should be checked on a related calculator.
  • Modular exponentiation — Fast modular power a^b mod m for large exponents—binary exponentiation in the browser. when units or numeric output should be checked on a related calculator.

Common use cases

  • Log base change for quick local checks without uploading data.
  • Copy results into tickets, docs, or classroom notes.

Common mistakes to avoid

  • Unexpected input shape

    See the intro and how-to notes for accepted formats.

FAQ

Is processing local?

Yes—this runs entirely in your browser.

Agent prefill?

Use q or qb for the main text field when supported.

More tools

Related utilities you can open in another tab—mostly client-side.