Log Base 2 Calculator
Logarithm base 2 of a number.
Enter the values and press Calculate.
How to use Log Base 2 Calculator
The base-2 logarithm asks how many times you multiply 2 to reach x. This tool computes it for any positive number.
Open Log Base 2 Calculator on toolpermarket. It runs entirely in your browser, so you can start without creating an account.
Enter the number x in the fields above, then press Calculate.
Read the result below the form. Change any input and run it again as many times as you like — the math is instant and local.
Worked example. log2(8) is 3, because 2 times 2 times 2 equals 8.
When to use Log Base 2 Calculator. Use it for bit lengths, doubling steps, or anywhere powers of two appear.
Frequently asked questions
Is Log Base 2 Calculator free to use?
Yes. Log Base 2 Calculator runs entirely in your browser. There is no account, no upload, and no cost.
Does Log Base 2 Calculator work on mobile?
Yes. The layout is responsive, so Log Base 2 Calculator works on any phone, tablet, or desktop with a modern browser.
Why base 2?
Computers count in binary, so log base 2 measures how many bits a number needs or how many times a value doubles.
Can x be less than 1?
Yes. log2 of a fraction is negative, for example log2(0.5) is negative 1.