Fuel Energy and Range
BTU and kWh from tank and LHV; range from tank * mpg * load factor.
Example
You enter
- Fuel gasoline_E10
- Tank (gal) 18
- MPG 28
- MPG basis fuel gasoline_E10
- Load factor (0-1.5) 1
You get
- Theoretical range 504 mi
- Total (Btu) 2016000
Checked against published worked examples from: US DOE Alternative Fuels Data Center.
Details, formula, and sources
Formula or tableEnergy stored (BTU) = tank_gal × LHV; range = tank × mpg × load_factor for liquid fuels; conversion to kWh via 1 BTU = 0.000293 kWh.
Source and editionDOE EERE Alternative Fuels Data Center fuel-property table (LHV per fuel) by name; ASTM D975 (#2 diesel), D4814 (gasoline), D1655 (jet A) by name.
Free accessDOE AFDC free at afdc.energy.gov.
What governsEstimate. AHJ and licensed professional govern.
API field namesfuel, tank_gal, mpg, mpg_basis, load_factor, range_mi, total_btu
- LHV table gasoline E10 ~ 112,000 Btu/gal (AFDC 112,114-116,090); E85 83,950 (low end of AFDC 83,950-95,450); diesel #2 128,488; LPG 84,250; CNG 114,106 per gasoline-gallon-equivalent (5.66 lb x 20,160 Btu/lb; about 923 Btu/ft^3); jet A ~ 124,000 Btu/galDOE AFDC fuel-properties data sheet