# Logarithm Calculator

> Logarithm calculator: find the log of any number in any base, including natural log, with the formula shown. Runs entirely in your browser, no signup.

- **Canonical URL:** https://boringtoolskit.com/log-calculator/
- **Category:** Everyday Calculators
- **Evidence level:** authored-methodology
- **Reviewed:** August 2026
- **Last verified:** 2026-10-12
- **Privacy:** Inputs and results stay in this browser unless the page clearly labels an external request.

## How it works

Natural log: ln(x) is the exponent y with e^y = x; the tool also offers log base 10 and base 2.

## Worked example

ln(1,000) = 6.907755, because e^6.907755 = 1,000.

## Sources

- [Calculation methodology and verification standard](/methodology/)

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