Logarithm Calculator
Work out a log in any base, or find the number or base that makes a log true. Exact answers are given where there are any, and the log rules are worked through with your own numbers.
What you can do
- Logs in any base, including ln and log base 10
- Exact answers such as a half or three, where they exist
- Solve for the number or for the base
- The product, quotient, power and change of base rules worked with your numbers
- See the point on the log curve, or the rule as lengths on a ruler