Color Separation Calculator

Convert RGB colors to CMYK for print, calculate ink percentages, and estimate total ink coverage for color separation in prepress.

Red (0-255)

Green (0-255)

Blue (0-255)

Or enter HEX code

Number of Spot Colors

Spot Color Plate Cost ($)

CMYK Values

C0 M0 Y0 K0

Cyan (%)

Magenta (%)

Yellow (%)

Key/Black (%)

Total Ink Coverage

Total Plate Cost

RGB to CMYK Conversion

K = 1 - max(R', G', B') where R'=R/255

C = (1-R'-K) / (1-K)

M = (1-G'-K) / (1-K)

Y = (1-B'-K) / (1-K)

Total Ink = C + M + Y + K (max recommended ~300%)

Ink usage estimator.

Screen printing costs.

Print job cost estimator.

DPI/PPI calculations.

Optimal print run size.

Business card printing.