Calculators
How to Calculate Your Monthly Electricity Bill
Learn how to estimate your electricity bill by adding up appliance wattages and daily usage hours.
2026-05-12 5 min read
Why Your Electricity Bill Is Hard to Predict
Electricity bills depend on how many devices you run, for how long, and your tariff rate (cost per kWh). By adding up each appliance, you can predict your bill with surprising accuracy.
The Simple Formula
Monthly kWh = (Watts × Daily Hours × 30) ÷ 1000
Then multiply by your tariff rate (e.g. $0.12/kWh) to get the cost.
Common Appliance Wattages
- Air conditioner (1.5-ton): ~1500W
- Refrigerator: ~150W
- Ceiling fan: ~75W
- LED TV (43"): ~80W
- Washing machine: ~500W
- Water pump (0.5 HP): ~375W
- LED bulb: ~9W
Example Calculation
Running an AC (1500W, 8h/day) for a month:
1500 × 8 × 30 ÷ 1000 = 360 kWh/month
At $0.12/kWh: $43.20/month just for the AC.
Calculate Your Full Bill
Add all your appliances in our electricity bill calculator to see a complete breakdown and monthly total.