What is this calculator?
Find a logarithm to a chosen base.
What can you use it for?
Use it when solving an exercise, checking a result, or working with the particular quantities shown in this form. Find a logarithm to a chosen base.
How to use it
- Enter positive value.
- Enter logarithm base.
- Select Calculate (or Generate for random tools).
- Read the answer and any additional results below the form. Check the units and the limits of the method.
Formula and method
Result = ln(positive value)/ln(logarithm base)
The formula uses the units and definitions shown above. Each input is substituted before the arithmetic is evaluated; the calculated output is rounded for display.
Worked example
Positive value: 1000, Logarithm base: 10. The result is 3 (result).
Assumptions and limits
Base must be positive and different from 1.
Frequently asked questions
What inputs does the Log Calculator need?
Use positive value, logarithm base. Read the answer and any additional results below the form. Check the units and the limits of the method.
What assumptions apply to the Log Calculator?
Base must be positive and different from 1.