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Runtime at Partial Load
Interpolate the manufacturer's 25/50/75/100% fuel points to the load you actually run, instead of assuming full load.
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Generator calculators
Load lists, sizing, fuel and runtime, installation budget, running cost, and maintenance, each with visible math.
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Fuel Storage & Containment Sizing
On-site fuel for an autonomy target, plus the 110% containment volume and the SPCC threshold check.
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Propane Tank Sizing & Vaporization
A propane tank must vaporize the generator's BTU per hour at the coldest expected temperature, not just hold enough gallons.
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Fuel Tank & Runtime Calculator
Runtime from a tank, or the tank you need for a target runtime, with the usable-volume limit applied.
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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.
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Natural Gas Generator Consumption
Cubic feet, therms, and dollars per hour for a natural gas set, including the pipeline supply figure you must give the gas fitter.
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Propane Generator Consumption
Gallons, pounds, and BTU per hour for a propane set, plus how many hours a tank of a given size buys.
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Gasoline Generator Fuel Consumption
Gallons per hour, tank runtime, and cost per hour for a gasoline portable or standby set.
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Diesel Generator Fuel Consumption
Gallons per hour from BSFC or from the manufacturer's own full-load number, at any load fraction.
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UPS + Generator Compatibility
Rectifier type, harmonic current, and the sizing ratio that keeps a UPS from shutting a generator down.
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