Tools & Trackers / Generator Fuel Calculator
Generator Fuel & Runtime Calculator
Pick what you'd run during an outage. We'll check whether your generator can handle it and how many days your fuel will last.
Your generator
Find the running and starting watts on the generator's label or listing. Not sure which generator? Compare our picks.
What you'll power
Fuel on hand
0
days of fuel
Safety first: run generators outside only, at least 20 feet from doors, windows and vents, never in a garage or porch. Put a battery CO alarm near every bedroom.
These are estimates. Appliance watts are typical values, and fridges, freezers and pumps only run part of the time, so we use their average draw for fuel. Gas burn is estimated from your generator's size and average load, about 0.13 gallons per hour per 1,000 watts plus a small idle draw. Propane uses about 27% more gallons than gasoline, and a 20-lb tank holds about 4.7 gallons. Your inputs stay in this browser.