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Fuel Cost per kWh

Turn any fuel price and energy content into dollars per delivered kWh, then compare it with the grid rate.

Inputs

Inputs and assumptions

Price per gallon for liquid fuel, or per therm for gas.

Diesel 138,000, gasoline 120,000, and propane 91,500 BTU per gallon; 100,000 BTU per therm.

Diesel generators reach 30-38%; gasoline and gaseous sets sit near 20%.

All-in cents per kWh from a recent bill.

Result

Generator fuel cost per kWh
—
Generator to grid ratio
—
Electrical energy per fuel unit
—
Grid cost per kWh
—
Premium per kWh
—

What to check

  • Current utility rate including all riders and taxes
  • Fuel price at the volumes you actually buy

Related calculators

Fuel figures are estimator-grade. A manufacturer fuel curve at your load and ambient beats any generic curve; verify the nameplate rating, the actual load fraction, and the delivered fuel price before you size a tank or promise a runtime.

Saved calculations

Keep the assumptions with the result.

Save this calculation to return to the inputs, result, and report anytime.

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