This paper presents a calculation method to estimate an energy saving for the residential sector in Thailand. The energy saving proposed calculation method adopted from British Standard EN 16212:2012 with top-down energy saving calculation developed by British Standard Institution (BSI). The indicators are proposed to reflect the energy saving for Thailand's residential sector, i.e. the total energy consumption, electricity energy consumption, petroleum product consumption per dwelling, electricity energy consumption in refrigerator, washing machine, and air-conditioner (A/C). The calculation considers an energy saving per indicator in year 2010 and 2014, which based on year 2000. The result shows the energy saving per indicator in washing machine and air-conditioner electricity energy consumption. In the washing machine, the electricity energy that saved in year 2010 and 2014 are 24.57 ktoe and 13.11 ktoe. Similarly, the saving of A/C in 2010 and 2014 are 388.72 ktoe and 625.41 ktoe. The A/C energy consumption indicator shows the highest energy saving.