Everyday AI · Daily life
Calculate appliance electricity costs (Meralco and electric coops)
Do you want to know how much an aircon, refrigerator or computer adds to your monthly electric bill?
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What to do
- Find the appliance wattage on its back label (e.g. 1000W aircon, 150W refrigerator, 65W laptop charger).
- Estimate how many hours per day you run it.
- Paste the prompt below into an AI assistant to compute the estimated daily and monthly peso cost.
Try this prompt
Supply a measured kWh value when possible, or wattage, usage time, duty factor, and your own dated PHP/kWh rate.
Estimate an appliance's energy use with transparent assumptions. Do not guess a current Meralco, cooperative, or other utility tariff.
Appliance: [name]
Rated power in watts: [value or unknown]
Measured energy in kWh, if available: [value and measurement period]
Hours used per day: [value]
Number of days: [value]
Duty factor or actual cycling information: [value/evidence or unknown]
My supplied rate in PHP/kWh: [value or unknown]
Rate source and billing period: [details]
Prefer measured consumption when its period matches the calculation. Otherwise show the constant-power formula: kWh = watts/1000 × hours/day × days, and explain whether a duty-factor adjustment is supported. For variable/cycling equipment, do not pretend rated wattage equals continuous real consumption.
Cost = estimated kWh × my supplied rate. If the rate is missing, calculate energy only and ask for it. A hypothetical example must be labelled hypothetical and kept separate from my estimate.
Show units, arithmetic, assumptions, and a reasonable range where supported. Explain that fixed charges, taxes, discounts, billing-rate structure, and actual usage can change the final bill. Do not present this estimate as the utility's bill or a guaranteed saving.See a sample result
Illustrative example. Your answer may differ.
Arithmetic fixture, not a tariff claim: 60 W × 8 hours/day × 30 days = 14.4 kWh. With no supplied rate, no current-price answer is given. At a hypothetical PHP 12/kWh, the estimate is PHP 172.80.
Before you use it: Use your own bill's dated PHP/kWh rate. Rated wattage may not equal actual consumption for cycling or variable-power equipment, and the estimate excludes fixed charges and billing adjustments.
Philippine notes
- For cycling or variable-power equipment, measured consumption is more reliable than assuming the label wattage runs continuously.