Click here for an example [ Log7(5) ]
1. Plug in the number you want to log into the "Logarithm of" box.
2. Select a base by clicking on the circle to the left of the base you want. If you want another base, click on "Other" and type in the base you want.
3. Click on the "Calculate" button and the logarithm of that number will be appear the box above.
In mathematics, the logarithm of a number to a given base is the exponent to which the base must be raised to give that number.
For example, the logarithm of 1000 to the base 10 is 3, because 10 raised to the power of 3 is 1000; the base 2 logarithm of 32 is 5 because 2 to the power 5 is 32.
The logarithm of x to the base b is written logb(x).