Kerosene Heater Fuel Consumption Calculator
Reviewed by Hamza Gujjar, Algorithm Architect & Software Developer
Last updated: July 27, 2026Kerosene Heater Fuel Consumption Calculator
Kerosene contains a standard, well-established amount of energy per gallon - this calculator uses that reference figure to estimate how much fuel a kerosene heater will consume over a given run time.
Total Energy (BTU) = Heater Output x Run Hours
Kerosene Needed = Total Energy / 135,000 BTU per gallon
Example
A 23,000 BTU/hour heater running for 8 hours:
Total Energy = 23,000 x 8 = 184,000 BTU → Kerosene Needed ≈ 1.363 gallons
About the 135,000 BTU/Gallon Figure
This is a standard reference energy content figure commonly used for sizing kerosene heaters and estimating seasonal fuel needs - this calculation assumes 100% combustion efficiency for simplicity, while real kerosene heaters typically achieve efficiencies in the 95-99% range, meaning actual fuel consumption in practice runs only marginally higher than this idealized estimate.
Practical Use
This kind of estimate is useful for planning fuel purchases ahead of a heating season, sizing a fuel storage tank appropriately, or comparing the running cost of kerosene heating against alternative heat sources on an apples-to-apples energy basis.