When you need on-site power from a diesel generator, it is important to know how much fuel your equipment needs, how long you can generate power using your current fuel reserves and when you will need refueling.   This generator run time calculator will not only calculate generator burn rates for multiple gensets, but will also calculate the run time of your generator(s).  This tool will also calculate the runtime and burn rate for multiple generators.

You will need:

  • Number of Generators
  • kW Rating of Generators
  • Percentage of Load
  • Gallons of Fuel Stored

Using this data, our generator run time calculator will factor the values and output your generator(s) burn rate and generator run time based on the number of gallons in your fuel reserves.  If you have a more complicated system, contact us to have a free assessment of your generator yard and custom calculations to calculate your generator burn rate and calculate your generator run time.

Please note: this generator burn rate calculator and generator run time calculator is meant to provide a general idea of generator burn rates and run times.  Calculations for generator burn rates and run times can vary due to generator type, make and model, environmental factors, fuel type, fuel quality, and differences in electrical switchgear and other equipment.  To ensure your facility never runs out of emergency generator fuel, contact us.

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Generator Run Time Considerations

Whether you operate a data center, healthcare or pharmaceutical facility, or any other business with a backup generator, knowing your generator burn rate and run time is critical.  The generator burn rate and generator run time calculator above will give you an idea of how long your organization can operate on generator backup power.

During a power outage, how quickly will your generator need fuel?  How long can your generator run on the fuel you have?  Determining your generator run time will help ensure you don’t experience downtime.  If your generator run time is 48 hours or less we recommend planning for refueling in 24 hours or less.  If your generator run time is less than 24 hours, your fuel capacity should be increased to allow for at least 24 hours of generator run time.


Read about our work with FEMA during Hurricane Sandy.

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What Our Customers Think

Thank you for your outstanding support during the humanitarian relief efforts after Hurricane Sandy. We here at DLA Energy appreciate your committed support to those impacted by the storm. Your herculean effort and dedication has helped millions of Americans during this devastating period. Your leadership on the ground and swift response to DLA Energy, FEMA, and state and local governments was critical the mission success

Giovanni Tuck, Brigadier General, USAF Commander

Each of your members displayed a willingness to go above and beyond the call to ensure multiple delivery missions to facilities. You kept the principal Aerial Port of Debarkation generations filled for constant use for all Joint Warfighter’s benefit so they could meet mission. Your Emergency Response Team was prepared and again, integrated across the board with key stakeholders.

Matt Ott, CDR, SC, US Navy

The thanks goes out to you and your outstanding crew. I handled life support for the main port in Port-au-Prince, and while Foster Fuels was present, fuel was not just taken care of, but incredibly flexible and adaptive to multiple needs. It was as easy as simply talking with your folks and they leaned forward and took care of the need.

1Lt Travis Michelena, JLC, Haiti

I just wanted to take a moment and commend your company and the fine crew that I had the pleasure of working with during the Kentucky Ice Storms. In my short time with FEMA and working seven major disasters, I have never worked with any contracting team that was more professional and such a pleasure to work with. We faces incredible weather conditions and long hours but I never heard one complaint out of the entire crew. The only thing I heard was what can we do now and how can we better complete and make the mission a success.

John Formet, Sr FEMA Region IV Logistics Accountable Property Manager