The objective of the analysis was to calculate the attainable CO2 emissions associated with the production of one ton of potatoes in a high yield environment in southern Chile. Two field experiments were performed. The first field experiment used an optimal sowing date while the second experiment used a late sowing date. In each experiment, treatments were the factorial combination of (i) four N fertilization rates (0, 75, 150 and 250 kg N ha(-1)) and (ii) four P fertilization rates (0, 150, 300 33 and 450 kg P2O5 ha(-1)). The Cool Farm Tool - Potato (CFT) was used to calculate the amount of CO2 produced per one ton of potatoes and LINTUL-Potato was used to simulate potential yields. High variations in tuber yields were observed across experiments (90 and 36 t ha(-1)). The average tuber yield in experiment one (82 t ha(-1)) was greater than experiment two (51 t ha(-1)). Tuber yields were not significantly affected by N fertilization in either experiment. In contrast, tuber yield responded (P < 0.01) positively to P fertilization (10-82 %). The gaps between maximum and potential yields simulated in experiments one and two were 4 and 14 %, respectively. In experiment one, the average total CO2 emissions per ton of potatoes were lower than experiment two (41 and 72 kg CO2 eq t(-1), respectively). In both experiments the total CO2 emissions were affected (P < 0.01) by both N and P fertilization. We conclude an average CO2 emission of 46 CO2 eq t(-1) could be considered an attainable value for potato production systems with high technology intending to improve their carbon footprints in southern Chile.