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?
Quick answer
Estimated monthly cost = (watts ÷ 1,000) × hours used per day × days used × your supplied PHP-per-kWh rate. Use a dated rate from your own bill. Actual use can differ for cycling or inverter appliances.
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AI narration · English · Prompt text stays on the page
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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 this appliance’s electricity use and cost from only the figures I provide. Do not guess my utility’s current rate.
INPUT
Appliance: [NAME]
Rated power: [WATTS / kW / TO CONFIRM]
Typical hours used per day: [HOURS]
Days used per month: [DAYS]
Electricity rate I want to use: ₱[AMOUNT] per kWh
Rate source/date: [MY BILL / UTILITY SOURCE / OTHER / TO CONFIRM]
Other known operating modes: [e.g. standby, inverter range / NONE / TO CONFIRM]
VALIDATE
- Convert watts to kW explicitly: W ÷ 1000.
- Check hours/day is 0–24 and days/month is plausible.
- Do not invent Meralco/coop rates, taxes, system-loss charges, appliance duty cycle or inverter behavior.
- A nameplate/rated wattage is not necessarily actual continuous consumption; label that limitation.
- If the appliance cycles or varies power and I have no measured average, keep the result a rated-power estimate.
CALCULATE
1. kW used for estimate.
2. kWh/day = kW × hours/day.
3. kWh/month = kWh/day × days.
4. Estimated cost = kWh/month × supplied ₱/kWh.
5. Optional scenario table for usage hours I explicitly request.
Show formula → substituted numbers → units → result. Recompute once. End with “Estimate basis / What could make actual bill usage differ / What to verify on my bill or appliance label.”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.
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