Water is an incredibly important aspect of our daily lives. Water footprint assessment is a fast-growing field of research, but as yet little attention has been paid to the uncertainties involved. The study investigates the sensitivity analysis of water footprint conducted in Samrakalwana village near Allahabad, UP, India. Water footprint was calculated for the Paddy crop and factors that influence the water footprint are identified. Sensitivity analysis was done for the parameters influencing water footprint with the One-at-a-time method (OAT), for parameters like reference evapotranspiration (ET0), Crop Coefficients (Kc), Precipitation (PR), Crop planting date, Field capacity of soil moisture (Smax), and Yield(Y). The results show that the water footprint of Paddy is 3384.701l/kg. The parameters like ETo, Kc, PR, and Smax are changed within the range of ±90%, and Crop Planting Date changes within the range of ±30%, and yield is changed within the range of ±50%. The water footprint is most sensitive in ET0, Kc, PR followed by yield. Sensitivity Index Parameters have calculated and for increasing the yield of the Paddy crop certain recommendations have been explained.