GI calculator

Please, cite the corresponding literature: 

Signorelli S, Casaretto E, Etchemendy-Gamundi M, Bentancor M, Harvey Millar A. The Green Index: A Widely Accessible Method to Quantify the Degree of Greenness of Photosynthetic Organisms. Plant Cell Environ. 2025 Nov;48(11):8027-8043. doi: 10.1111/pce.70102. Epub 2025 Aug 4. PMID: 40760762; PMCID: PMC12502032.

If you do not have access to a Windows PC, you can use the tables below. Insert your RGB values and get your GI.

NOTE: Please, remove your values after using it, so the spreadsheet is clean for other users. We recommend you to copy your GI values and do all the posterior analysis (means, deviation, etc.) in your own spreadsheet.