Logarithm Calculator
Calculate logarithms in different bases.
This Logarithm Calculator allows you to calculate or convert values instantly. It is free, fast, and easy to use.
- Free Online Tool
- Instant Results
- Mobile Friendly
- No Installation
- Secure & Private
Understanding This Calculator
Logarithm Operations
A logarithm tells you what exponent is needed to produce a number from a base.
logb(x) = y means by = x
- Log₁₀: Common logarithm (base 10)
- Ln: Natural logarithm (base e ≈ 2.718)
Example 1 (Log Base 10)
Number: 100
- 102 = 100
- Log₁₀(100) = 2
Example 2 (Natural Log)
Number: 7.389 (≈ e²)
- e2 ≈ 7.389
- Ln(7.389) ≈ 2
How to Use
- Enter a positive number.
- Optionally enter a custom base.
Frequently Asked Questions
How do I use the Logarithm Calculator?
Enter your values in the input fields, and the result will appear instantly.
Is this calculator free to use?
Yes, this calculator is 100% free and does not require any registration or subscription.
Is it mobile-friendly?
Absolutely! Our tool is optimized for all devices, including mobile phones, tablets, and desktop computers.