Logarithm Calculator
Calculate common logarithms, natural logarithms, and logarithms with any base. Supports log₁₀, ln, and custom base with a log table included.
Log Table
| x | log₁₀(x) | ln(x) |
|---|---|---|
| 0.001 | -3.000000 | -6.907755 |
| 0.01 | -2.000000 | -4.605170 |
| 0.1 | -1.000000 | -2.302585 |
| 0.5 | -0.301030 | -0.693147 |
| 1 | 0.000000 | 0.000000 |
| 2 | 0.301030 | 0.693147 |
| 3 | 0.477121 | 1.098612 |
| 5 | 0.698970 | 1.609438 |
| 10 | 1.000000 | 2.302585 |
| 50 | 1.698970 | 3.912023 |
| 100 | 2.000000 | 4.605170 |
| 1000 | 3.000000 | 6.907755 |
How to Use
Enter Values

Enter number and base
Calculate

Logarithm is calculated automatically
Check Results

Check calculation result
Features
Three Types
Supports log₁₀, ln, and custom base
Instant Calculation
Calculate logarithm in real-time
Log Table
Common logarithm values
FAQ
🔗Related Tools
Percentage Calculator
Calculate percentages easily. Instantly compute ratios, rate of change, and percent values.
Split Bill Calculator
Easily split bills for dining and parties. Instantly calculate per-person amount.
Random Number Generator
Generate random numbers within a specified range. Customize count, decimal places, and duplicate control.
Number Base Converter
Convert between binary, octal, decimal, and hexadecimal. Also supports custom base conversion (base 2 to 36).
GPA Calculator
Calculate your GPA (Grade Point Average) from course grades. Supports credit-weighted calculations.
Ratio Calculator
Calculate, simplify, and solve ratios. Solve for unknown values in A:B = C:D proportions.