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Free Log Calculator - Logarithms
Calculate common log, natural log (ln), and logarithms with any base.
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CalculateQuick Answer
Logarithm answers: what exponent gives this result? log₁₀(100)=2 because 10²=100. ln uses base e (~2.718).
Key Facts about Log Calculator:
- log₁₀(100) = 2
- ln(e) = 1
- log(a×b) = log(a) + log(b)
- log(a/b) = log(a) - log(b)
- Change of base: logₐ(x) = log(x)/log(a)
Why Use Our Log Calculator?
Log tools:
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All Bases
Log 10, ln, custom base.
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Inverse
Anti-log too.
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Properties
Log rules explained.
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Step-by-Step
See the work.
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Instant
Quick results.
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Private
Data stays secure.
How to Log Calculator in 3 Easy Steps
Calculate logs:
1
Enter Number
The argument.
2
Select Base
10, e, or custom.
3
Get Result
See logarithm.
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Logarithms
Log calculations made easy
Frequently Asked Questions
Everything you need to know about our log calculator
What is ln?
Log base e (~2.718) - natural log.
Natural logarithm, log base e (~2.718). Used extensively in calculus and science.
Still have questions? Try the tool yourself!
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