Log Calculator
Calculate the base-10 logarithm of any positive number.
Calculate
Enter your values below.
Result
log₁₀(x)
0
Formula used
log₁₀(x), the power 10 must be raised to, to get x
Example: log₁₀(1000) = 3.
How to use this calculator
- Enter Number.
- Press Calculate to see your result instantly.
FAQ
Frequently asked questions
Why must the number be positive?
Base-10 logarithm is only defined for positive real numbers.
What is log(1)?
0.
What is log(10)?
1.
Where is base-10 log used?
Common in the Richter scale, decibels, and pH — see also the general Logarithm Calculator for any base.