Useful Color Calculators and Spreadsheets


CIE Color Calculator: Converts among most of the CIE color models as well as providing correlated color temperature and standard RGB conversions.

Color Difference Calculator: Computes color differences using several different methods (CIE1976, CIE1994, CIE2000, CMC).

Spectral Calculator Spreadsheets: Calculates colorimetry, densitometry and RGB values from your spectral data.

ColorChecker RGB Summaries, Spreadsheets and Lab TIFF File: You will find three things on this page, a) summaries of the ColorChecker colors, expressed in each of many standard RGB color spaces, b) spreadsheets that allow you to find which RGB color space is closest to your RGB values, and c) a computer generated Lab TIFF file of the ColorChecker.

Dot Gain from Lab or Profile: Two spreadsheets which calculate dot gain from Lab measurements, also allowing you to measure the dot gain of a CMYK ICC printer profile.