log base 10 of 100
Enter the number:: 100; Enter the base:: 10
Logarithm (log<sub>base</sub>): 2
Logarithm Calculator
Math0.0(0)
Calculates the logarithm of a number to a specified base.
More tools:Math & Statistics Calculators
How To Use
How to use this calculator
Start with your values, or try a preset.
Step 1
Enter Enter the number: and Enter the base: in the units shown.
Step 2
Read Logarithm (log<sub>base</sub>) in the results panel. Results update as you change the inputs.
Step 3
Choose a preset to load an example, then adjust the values for your situation.
Worked Examples
Example calculations
See the inputs and their calculated results.
log base 2 of 8
Enter the number:: 8; Enter the base:: 2
Logarithm (log<sub>base</sub>): 3
log base e of e (natural log of e)
Enter the number:: 2.71828; Enter the base:: 2.71828
Logarithm (log<sub>base</sub>): 1
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