RGB ↔ CMYK
Calculate RGB ↔ CMYK instantly with the exact formula and a worked example. Free online calculator — no signup.
RGB ↔ CMYK
R
G
B
K (CMYK)
0.215686
More about: RGB ↔ CMYK
What it calculates
The “RGB ↔ CMYK” calculator computes K (CMYK) from 3 parameters: r, g, b.
A converter between units of measure, currencies, and sizes.
Example calculation
With parameters R = 100, G = 150, B = 200 the result is 0.2157.
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.