Find the logarithm of a number in any base, along with ln, log₁₀, log₂ and eˣ.
loading toolHow to use the logarithm calculator
- Type your numbers in the boxes (pick your currency or units if asked).
- The answer updates as you type: no button to press.
- Copy the result, or share it on WhatsApp with one tap.
Questions
What is log base b of x?
The power you raise b to in order to get x: log₁₀ 1000 = 3 because 10³ = 1000.
Is my data private?
Yes. Everything happens inside your own browser: nothing you type or choose is uploaded to us or anyone else.
Is it free?
Completely free, with no sign-up, no watermark and no limit on how many times you use it. Light ads keep the site running.
