Log Calculator
Change-of-base handles arbitrary bases; ln and log₁₀ one click away via base e/10.
log_10(100)
2
How the Log Calculator works
The calculation follows the standard method used across the US — no shortcuts, no hidden assumptions. Here is exactly what happens behind the scenes:
Formula
log_b(x) = ln(x)/ln(b)
Frequently Asked Questions
How does the Log Calculator work?
Enter your numbers above and results update instantly using standard formulas, computed entirely on your device.
Is the Log Calculator free to use?
Yes — completely free with no signup required, and it works on phones, tablets, and desktops.