Enter any heater wattage to see the exact cost per hour, per day, and per month. Works for all heater types — oil, ceramic, infrared, fan, and more.
The formula is simple: divide your heater's wattage by 1,000 to get kilowatt-hours (kWh) per hour, then multiply by your electricity rate. For example, a 1,500W heater uses 1.5 kWh per hour. At $0.15/kWh, that's 1.5 × $0.15 = $0.23 per hour.
This calculator works for any electric heater type — oil-filled radiators, ceramic heaters, infrared panels, fan heaters, and baseboard heaters. The cost per hour depends only on wattage and electricity rate, not on heater technology. However, real-world monthly costs vary significantly: oil heaters cycle 30–40% less due to thermal retention, while ceramic and fan heaters run at full power when on.
For heater-specific calculators with cycling adjustments, try our oil heater cost calculator, ceramic heater cost calculator, or infrared heater cost calculator.
| Wattage | Cost/Hour | Cost/Day (4 hrs) | Cost/Day (8 hrs) | Cost/Month |
|---|---|---|---|---|
| 500W | $0.08 | $0.30 | $0.60 | $18.00 |
| 750W | $0.11 | $0.45 | $0.90 | $27.00 |
| 1,000W | $0.15 | $0.60 | $1.20 | $36.00 |
| 1,250W | $0.19 | $0.75 | $1.50 | $45.00 |
| 1,500W | $0.23 | $0.90 | $1.80 | $54.00 |
| 2,000W | $0.30 | $1.20 | $2.40 | $72.00 |
| 3,000W | $0.45 | $1.80 | $3.60 | $108.00 |
| 5,000W | $0.75 | $3.00 | $6.00 | $180.00 |
US average $0.15/kWh. 30 days/month. Costs are for continuous running — actual costs may be lower with thermostat cycling.