A few variables will affect the calories burned while riding a stationary bike, including body weight, conditioning level, metabolism and workout intensity. According to NutriStrategy, a person who weighs 130 pounds will burn 177 calories doing a very light stationary bike workout for an hour.
While calories burned goes up as body weight goes up, some factors can be controlled to maximize calories burned while riding a stationary bike, such as increasing the intensity of the workout. Doing this will result in a lesser amount of time to burn calories while increasing the heart rate substantially. A higher heart rate helps build metabolism to shed calories faster.