Real-cost calculator: per hour, per month and for the whole winter, based on your heater's wattage and your electricity price.
| Daily consumption | – |
| Cost per hour | – |
| Cost per month | – |
| Winter cost (5 h/day × 5 months) | – |
At full power (≈2000 W) and 5 hours a day it uses about 300 kWh per month: ≈€88/month at the EU-27 average (0.2896 €/kWh). Many oil radiators have settings (600/900/1500/2000 W): on a middle setting the cost drops proportionally.
A typical 1500 W convector costs ≈€0.43/hour at the EU-27 average; a 500 W low-consumption heater about €0.14/hour. Pick your country or bill price for the exact figure.
All resistance heaters (oil, convector, quartz, ceramic) turn 1 kWh into the same amount of heat: wattage and hours are what matter. 400-500 W models cost less because they heat less. For real efficiency, a heat pump delivers 3-4 kWh of heat per kWh of electricity.
Rule of thumb: for one room for a few hours, the space heater wins; for several rooms or all day, central heating (or an air conditioner in heat mode) is usually cheaper per useful kWh.
Formula: watts × hours ÷ 1000 = kWh; kWh × price per kWh = cost. Plain arithmetic, no hidden estimates. Winter estimate: 5 h/day × 152 days (5 months).
Typical wattages: home convectors are around 1500 W and low-consumption models 400-500 W per Energy Use Calculator; oil radiators usually offer 600-2000 W settings and quartz heaters ~1200 W (orientative ranges: your appliance's label rules).
Electricity prices: EU-27 and EU countries: Eurostat, DC band, 2nd half of 2025, taxes included. US: EIA, national residential average, June 2026. Dated benchmarks; your bill prevails.
Orientative estimate, not a bill or professional advice. See terms and disclaimer.