Logarithm Calculator
Free log, ln, custom base, and antilog calculator. Instant results, no sign-up.
Compute log (base 10), ln (base e), custom base, and antilog in one tool.
Result
log₁₀(100)
2
About the logarithm calculator
Free logarithm calculator with modes for common log (base 10), natural log (ln), any custom base, and antilog. Enter your values for instant results—no sign-up required.
- log₁₀ (base 10) and ln (base e)
- Custom base: log_b(x) for any base b
- Antilog: compute base^exponent
- Copy result and reset
Use cases
- Algebra and calculus
- Scientific and engineering math
- Decibel and ratio calculations
For unit conversion (e.g. dB, ratios), use the Logarithmic converter.
⭐ Rate this tool
Your feedback helps us improve
🔄 Workflow Suggestion
Try combining multiple tools for a complete workflow. For example: Notepad → Text Encryption → Save to Cloud or Date Calculator → Calendar → Countdown Timer
Related Tools & Recommendations
💡 You might also need
Base64 Encode/Decode
Convert text to Base64 format and decode Base64 strings
JSON Formatter & Validator
Format, validate, and minify JSON data with syntax highlighting and error detection
JSON Viewer
Inspect JSON in an interactive tree. Expand and collapse nodes, copy paths, and view formatted JSON.
📁 More Calculators Tools
Unit Price Calculator
Calculate price per unit from total price and quantity. Compare two products to see which is cheaper per oz, kg, or any unit.
Number Base Calculator
Add, subtract, multiply, and divide in binary, octal, decimal, or hexadecimal
Convolution Calculator
Calculate convolution of two functions or sequences with step-by-step solutions
🔗 Additional Related Tools
Send Feedback
We'd love to hear your thoughts! Your feedback helps us improve our tools and create a better experience for everyone.
Share Your Experience
Tell us what you think about this tool