How the running cost is computed
Four steps from the sticker on the unit to its share of your bill.
Check the nameplate sticker on the appliance, or start from a preset. Wattage is the power the unit draws while running.
wattsDivide by 1,000 to get kilowatts, then multiply by the hours of use. The result is kilowatt-hours, the unit your bill counts.
kWhMultiply the kilowatt-hours by your per-kWh rate. Divide any past bill's amount by its kWh to get your exact rate.
× ₱/kWhMultiply the daily cost by the days of use in a month. This is the appliance's share of your bill, ready to compare.
× daysWhat an aircon costs to run
worth a lookThe running cost of any appliance comes from three numbers: its wattage, the hours you use it, and your rate per kilowatt-hour. Divide the wattage by 1,000 to get kilowatts, multiply by the hours to get kilowatt-hours, then multiply by your rate. The wattage is on the nameplate sticker at the back of the unit. Your exact rate is any past bill's total divided by the kWh it used, with every generation, transmission, and tax charge already folded in.
Take a 950-watt aircon running 8 hours at ₱12 per kilowatt-hour. That is 0.95 kilowatts times 8 hours times ₱12, about ₱91 for the night. By horsepower at the same rate, a non-inverter window unit runs roughly ₱6 per hour at 0.5 HP, ₱11 at 1.0 HP, and ₱17 at 1.5 HP. An inverter unit averages 30 to 40 percent less over a long night, since its compressor slows down instead of switching fully off and on.
Your real bill will not match to the peso. Aircon compressors cycle off once the room cools, refrigerators run only part of each hour, and the generation charge moves a little each month, so treat the figure as a close estimate. Multiply the daily cost by the days of use to see an appliance's monthly share. For other household running costs, the gas consumption calculator does the same for fuel, and the inflation calculator tracks how rates have climbed.
Questions people ask
answered in plain wordsDivide the wattage by 1,000 to get kilowatts, multiply by the hours of use to get kilowatt-hours, then multiply by your rate per kWh. A 950-watt aircon running 8 hours at ₱12 per kWh costs 0.95 times 8 times 12, about ₱91 for the night.
At a rate of ₱12 per kWh, a non-inverter window unit costs roughly ₱6 per hour at 0.5 HP, ₱11 at 1.0 HP, and ₱17 at 1.5 HP. An inverter unit averages about a third less once the room reaches temperature, since the compressor slows down instead of running full blast.
It is on your bill. Divide the total amount due by the kWh consumed for that month and you get your effective rate, with all the generation, transmission, and tax lines already baked in. Meralco residential rates have been running near ₱12 per kWh; electric cooperatives in the provinces vary on either side of that.
Check the nameplate sticker at the back or side of the unit, the plug tag, or the manual. It is listed in watts (W) or kilowatts (kW). For aircons rated in horsepower, 1 HP of cooling draws roughly 900 to 1,000 watts on a non-inverter unit.
Appliances rarely draw their full rated power the whole time. Aircon compressors cycle on and off once the room is cool, refrigerators run only part of each hour, and washing machines draw more during spin than wash. Rates also move a little every month with the generation charge. Treat the result as a good estimate, not a guaranteed figure.
Generally yes, when it runs for long stretches. An inverter unit varies its compressor speed instead of switching between full power and off, and typically averages 30 to 40 percent less energy over a full night. For short bursts of use the gap narrows, since the savings come from the long steady cruise after the room cools.
No. Every calculation runs privately on your device. Nothing you type is stored, tracked, or sent to a server.