Log Calculator (Logarithm)

Log Calculator

Calculate logarithms with base 10, natural log, or custom base

Enter Value

Please enter a valid positive number

Select Base Log Base 10 (Common Logarithm) Natural Logarithm (Base e) Custom Base

Custom Base Value

Please enter a valid base (positive and not 1)

Calculation Result

0

About Logarithms

• Logarithm is the inverse function of exponentiation
• Common logarithm uses base 10 (log₁₀)
• Natural logarithm uses base e (approximately 2.718)
• Logarithm of 1 is always 0, regardless of the base