Generator fuel runtime calculator

How long will your fuel last? We use the maker's own run-time figures.

Generator

Hours at 25% load (full tank)hHours at 50% load (full tank)hTank sizegalPropane: hours on a 20 lb tankhAt 50% load. Leave 0 if gas only.

Fuel on hand

Gallons of gasgalLoad: 50% of the generator's rated powerFuel price per gallon (optional)$/galType your local price. We never look up prices.

Estimated run time

About 15 hours

An estimate from the maker's published figures, at 50% load. Real run time varies with temperature, altitude and how the load changes.

We don't test units ourselves; figures come from manufacturer spec sheets and the sources linked. How we research.