Gas Heater Running Cost
Enter the heater heat output, efficiency, operating schedule, and your gas price per kWh to estimate running cost.
Estimate only. Enter your own gas price; no tariff lookup is used.
- Gas input
- Daily cost
- Monthly cost
- Annual cost
A QUICK WALKTHROUGH
How to use this tool
- Enter heat output and efficiency.
- Enter hours per day, days per week, and your gas price per kWh.
- Review daily, monthly, and annual cost estimates.
User-entered assumptions
Gas input (kW) = heat output (kW) ÷ efficiency. Annual cost = gas input × hours/day × days/week × 52 weeks × price per kWh. Monthly cost is annual cost ÷ 12.
Local arithmetic
This calculator uses only the values you enter and runs in your browser. It does not look up fuel prices or assess a heater, installation, ventilation, or safety.
GOOD TO KNOW
Common questions
Does this look up my gas tariff?
No. Enter the gas price per kWh yourself; the tool does not retrieve or recommend a tariff.