Power Calculators

log2 Log Base 2 Calculator

Calculate the base-2 logarithm.

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Enter details

log2 Result
3
Valid Input
1

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

📘 About the Log Base 2

Useful in computing and binary systems.

🧮 Formula

Where

  • log2(x) = ln(x) / ln(2)
Input must be positive.

✏️ Worked example

log2 of 8

You enter
Number8
You get
log2 Result3
Valid Input1

The result is 3.

Try this example →

🧭 How to use this calculator

What you enter

  • Number

What you get

  • log2 Result
  • Valid Input

💡 Common uses

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

❓ Frequently asked questions

What is log2(8)?

3.