We all know that air-cond is one of the main home appliances that consumed most electricity power. If you can save the air-cond usage, then you can save some money from electricity bills. How much is the electricity bill for air-cond if it is ON for one hour? If you know its calculation, you will find out that air-cond’s consumption per hour is not that “scary” but once you accumulated the usage, it is actually a big amount. Calculation of air-cond’s usage: 1 HP (horse power) = 746W(Watt) or 0.746KW(Kilo-watt) 1 KWH (Kilo-Watt-hour) = RM0.286 0.746 KWH = RM0.21 = 21 sen per hour If you ON  8 hours per day  (night) = RM0.21 x 8 hours =  RM1.71 Usage for  one month  = RM1.71 x 31 days =  RM52.90 This is the monthly usage for 1 HP air-cond. Summary on air-cond’s consumption in RM: 1.0 HP  = RM0.21 per hour =  RM52.90 per month  (one day 8 hours) 1.5 HP  = RM0.32 per hour =  RM79 per month  (one day 8 hours) 2.0 HP  = RM0.42 per hour =  RM105 per month  (one day 8 hours) 2.5 HP  = RM0.53