functions
Log Calculator
Calculate a logarithm.
Any base, plus ln and log10 shown automatically. Free, no signup.
Frequently Asked Questions
The logarithm of a number is the exponent you'd need to raise the base to, to get that number. For example, log base 2 of 8 is 3, since 2^3 = 8.
ln is the natural logarithm, base e (about 2.71828). log10 is the common logarithm, base 10.