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# Generator fuel calculator

Estimate genset fuel per hour, run time on your tank, and cost per hour and per kWh, calibrated from two load points.

Enter a rating and two calibration points to fit the fuel curve.

The curve is a straight line through your two points: consumption equals a no-load figure plus a fixed amount per kilowatt of load, which is a good model for a diesel set between a quarter and full load and worse outside it. The fuel type only labels the output; the calibration points decide every number, so measured points from your own set beat defaults. Manufacturer data sheets quote consumption at fixed loads with fresh engines and clean fuel, and real installs rarely match them.
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## More unit & math tools

- [Unit converter](/converters/units)
- [Average and median](/converters/statistics)
[All unit & math tools](/converters)

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