Electricity Cost Calculator
Updated Formulas shown
Cost = watts × hours ÷ 1,000 × price per kWh. A 1,500 W space heater running 4 hours a day costs about $32.85 a month at 18¢/kWh.
Cost per month
$32.85
$394.20 per year
- Per day
- $1.08
- kWh per day
- 6
- kWh per month
- 183
- kWh per year
- 2,190
Quick reference
| Appliance | Watts | Hours/day | Per month |
|---|---|---|---|
| Space heater | 1,500 | 4 | $32.85 |
| Window AC | 1,000 | 8 | $43.80 |
| Refrigerator (avg draw) | 150 | 24 | $19.71 |
| Gaming PC | 400 | 4 | $8.76 |
| LED TV | 100 | 5 | $2.74 |
| Electric dryer | 3,000 | 1 | $16.43 |
| EV charging (Level 2) | 7,200 | 2 | $78.85 |
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Frequently asked questions
How do I find an appliance's wattage?
Check the label or manual. If it lists amps, multiply by 120 V (or 240 V for large appliances) to estimate watts.
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Estimates only. Check quantities with your supplier or contractor before ordering.