Calculate the logarithm of a number for any base.
The natural logarithm is the logarithm to the base e, where e is an irrational and transcendental constant approximately equal to 2.71828.
Commonly used in calculus and growth/decay models.
The common logarithm is the logarithm with base 10. It is also known as the decimal logarithm.
Often used in pH levels (acidity), sound intensity (decibels), and Richter scale.
Most calculators only have buttons for ln and log10. To find a logarithm with a different base, use the Change of Base Formula:
This tool uses this method internally to calculate custom bases.