Aviation Fuel Weight Calculator
Convert aviation fuel volume to weight in pounds and kilograms for Avgas, Jet-A, JP-8, and Mogas.
Results
What is it?
Aviation fuel density varies by fuel type and temperature. Using volume alone is insufficient for weight-and-balance calculations — you must convert gallons to pounds. The standard densities used in aviation are: Avgas 100LL = 6.02 lbs/gal (6 lbs/gal is the common approximation), Jet-A = 6.80 lbs/gal, JP-8 = 6.70 lbs/gal, Mogas = 6.15 lbs/gal.
How to use
1. Select your fuel type from the dropdown. 2. Enter the fuel quantity in US gallons. 3. The calculator shows weight in pounds, kilograms, and equivalent liters.
Example scenario
A Cessna 172 has 53 gallons of Avgas 100LL. Weight = 53 x 6.02 = 319 lbs (145 kg). This is critical for weight-and-balance. Adding 319 lbs of fuel at the wing station affects both total weight and centre-of-gravity position.
Pro tip
Fuel density changes with temperature: cold fuel is denser, warm fuel is lighter. In very cold climates, Avgas density can be up to 6.10 lbs/gal; in hot climates, as low as 5.93 lbs/gal. For precise weight-and-balance, always check the actual density from fuelling records.