โ Math
Logarithm Calculator
A logarithm answers the question โwhat power do I raise this base to, to get that number?โ. Log scales compress enormous ranges into readable ones, which is why they appear in sound, earthquakes and finance.
How it works
Number
Base
Logarithm
Natural logarithm
Log base 10
Log base 2
Base to that power (check)
Frequently asked questions
How do I use the Logarithm Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.