A system and an associated method for determining the weight of an occupant (14) on an associated seat (16) are disclosed. The system includes a sensor (36) for sensing downward force on the seat (16) and a sensor (38) for sensing tension in an associated seat belt (34). A controller (28) is included for determining the weight of the occupant (14) as a function of an output (40) from the sensor (36) and an output (42) from the sensor (38).