Euler's Totient φ(n)
Calculate Euler's Totient φ(n) instantly with the exact formula and a worked example. Free online calculator — no signup, works on mobile.
Euler's Totient φ(n)
n
φ(n)
4
More about: Euler's Totient φ(n)
What it calculates
The “Euler's Totient φ(n)” calculator computes φ(n) from 1 parameter: n.
A core calculation for studying, engineering tasks, and checking solutions.
Example calculation
With parameters n = 12 the result is 4.
How to use
- Enter the parameter values — every field above is adjustable with a slider.
- The result and related metrics are calculated automatically as you type.
- Use the additional metrics shown (if any) where needed.
- Copy the result or bookmark the page.