Optimal management approaches can be adopted in order to increase crop productivity and lower the carbon footprint of grain products. The objective of this study was to estimate the carbon (C) footprint and global warming potential of rice production systems. In this experiment, rice production systems (including SRI, improved and conventional) were studied. All activities, field operations and data in production methods and at different input rates were monitored and recorded during 2012. Results showed that average GWP across production systems was equal to 2803.25 kg CO2-eq ha-1. The highest and least GWP were observed in the SRI and conventional systems, respectively. GWP per unit energy input was the least and most in SRI and conventional systems, respectively. Also, the SRI and conventional systems had the maximum and minimum GWP per unit energy output, respectively. SRI and conventional system had the greatest and least GWP per unit energy output, respectively. Therefore, the optimal management approach found in SRI resulted in a reduction in GHGs, GWP and the carbon footprint.