To rate a food product independent of the amount being consumed, we calculate the "improvement percentage" as follows:

Definitions

co2value_g = 2667

This is the CO2-equivalent value associated with your product. Our example product accounts for 2667 grams.

DFU = 0.32

Short for “Daily Food Unit”, this is the number of Daily Food Units associated with your product. Our example product has 0.32.

global CO2/DFU_g = 3894

This is the global CO2 divided by Daily Food Unit ratio, that we’ve calculated based on the millions of products that we’ve analyzed.

Result

Improvement percentage = 1 - (2667 / 0.32) / 3894 = -1.14

Improvement percentage = 1 - (co2value_g / DFU ) / global CO2/DFU_g

Hence, this food is 114% worse than average.

DE