Gas Heating Cost Calculator
Estimate what a gas heater costs to run each day, month, quarter, and year using MJ-per-hour consumption and your current gas tariff.
Key takeaways
- Gas heating cost depends mostly on appliance MJ use, daily run time, and tariff.
- This is useful for testing winter usage patterns before quarterly bills arrive.
- The annual estimate helps compare whether insulation or appliance upgrades might lower spend.
Gas heater usage
Tariff assumptions
Heating cost snapshot
$3.85
estimated daily gas cost
Monthly cost
$115.50
Modelled period cost
$346.50
Annual cost
$1,405.25
Gas usage
- Daily usage110 MJ
- Usage over 90 days9,900 MJ
- Rate$0.04 / MJ
How to use this result
- Use the MJ-per-hour figure from the appliance label or product specification sheet.
- Model a colder month by increasing hours per day instead of changing the tariff.
- Compare the annual cost against a newer efficient heater before winter peaks begin.
How should you use this gas heating estimate?
Use the appliance MJ-per-hour rating from the manufacturer whenever possible. Small changes in daily usage can have a meaningful impact on winter cost estimates.
If you want a full household picture, use this heater-only result alongside your cooking and hot water demand rather than relying on space heating alone.
What should you compare next?
FAQ
Gas heating calculator questions
Where do I get MJ-per-hour usage for my heater?
Check the appliance label or product specification sheet. Gas heaters usually list input in MJ/h.
Should I include only cold days?
Use an hours-per-day average that reflects the period you want to model. For winter planning, that normally means colder-month usage rather than a yearly average.
Does this include supply charges?
No. This calculator isolates the heating appliance itself. Pair it with the gas bill calculator if you want a fuller household estimate.