Power Calculators

ln Natural Log Calculator

Calculate the natural logarithm of a positive number.

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Fill in the details and click Calculate to see your results.


Also available in our Android app, with charts and full breakdown tables.

📘 About the Natural Log

Useful in growth, decay, calculus and probability.

🧮 Formula

Where

  • ln(x) = log base e of x
Input must be positive.

✏️ Worked example

Natural log of 10

You enter
Number10
You get
Natural Logarithm2.30259
Valid Input1

The result is 2.30259.

Try this example →

🧭 How to use this calculator

What you enter

  • Number

What you get

  • Natural Logarithm
  • Valid Input

💡 Common uses

  • School mathematics and algebra
  • Scientific calculations
  • Engineering and measurement

❓ Frequently asked questions

What is ln?

It is the natural logarithm with base e.