Fuel Consumption Chart for Industrial Generators
This diesel generator fuel consumption chart provides estimated fuel usage based on generator size and operating load. Use it to compare fuel consumption at different load levels and plan fuel requirements for commercial, industrial, and emergency power applications.
Actual fuel consumption varies depending on generator model, operating conditions, and electrical demand, so the figures should be used as general estimates rather than exact specifications.
How to Read the Industrial Generator Fuel Consumption Chart
This industrial generator fuel consumption chart estimates how many gallons of diesel fuel a generator uses per hour at different load levels. Find your generator’s size in kilowatts (kW) in the first column, then compare the estimated fuel consumption at 25%, 50%, 75%, or 100% load.
A generator operating at a lower load typically consumes fewer gallons per hour than one running at full capacity. However, actual diesel generator fuel consumption varies by engine model, equipment condition, operating environment, and electrical demand. For a closer look at how operating loads and other factors affect fuel usage, explore our Generator Fuel Consumption and Efficiency Guide.
Use these figures as a starting point when estimating fuel requirements for commercial generator rentals, emergency backup power, and industrial projects. Confirm actual consumption specifications for the equipment you plan to use.
IMPORTANT: This is NOT for natural gas generator fuel consumption. This is only for diesel generator fuel consumption.
| Generator Size (kW) | 1/4 Load (gal/hr) | 1/2 Load (gal/hr) | 3/4 Load (gal/hr) | Full Load (gal/hr) |
|---|---|---|---|---|
| 20 | 0.6 | 0.9 | 1.3 | 1.6 |
| 30 | 1.3 | 1.8 | 2.4 | 2.9 |
| 40 | 1.6 | 2.3 | 3.2 | 4.0 |
| 60 | 1.8 | 2.9 | 3.8 | 4.8 |
| 75 | 2.4 | 3.4 | 4.6 | 6.1 |
| 100 | 2.6 | 4.1 | 5.8 | 7.4 |
| 125 | 3.1 | 5 | 7.1 | 9.1 |
| 135 | 3.3 | 5.4 | 7.6 | 9.8 |
| 150 | 3.6 | 5.9 | 8.4 | 10.9 |
| 175 | 4.1 | 6.8 | 9.7 | 12.7 |
| 200 | 4.7 | 7.7 | 11 | 14.4 |
| 230 | 5.3 | 8.8 | 12.5 | 16.6 |
| 250 | 5.7 | 9.5 | 13.6 | 18 |
| 300 | 6.8 | 11.3 | 16.1 | 21.5 |
| 350 | 7.9 | 13.1 | 18.7 | 25.1 |
| 400 | 8.9 | 14.9 | 21.3 | 28.6 |
| 500 | 11 | 18.5 | 26.4 | 35.7 |
| 600 | 13.2 | 22 | 31.5 | 42.8 |
| 750 | 16.3 | 27.4 | 39.3 | 53.4 |
| 1000 | 21.6 | 36.4 | 52.1 | 71.1 |
| 1250 | 26.9 | 45.3 | 65 | 88.8 |
| 1500 | 32.2 | 54.3 | 77.8 | 106.5 |
| 1750 | 37.5 | 63.2 | 90.7 | 124.2 |
| 2000 | 42.8 | 72.2 | 103.5 | 141.9 |
| 2250 | 48.1 | 81.1 | 116.4 | 159.6 |
| 2500 | 53.4 | 91.4 | 132.9 | 177.9 |
| 2750 | 58.8 | 100.6 | 146.2 | 195.7 |
| 3000 | 64.1 | 109.7 | 159.5 | 213.5 |
Diesel Generator Fuel Consumption by Generator Size
Fuel consumption depends on generator capacity and how much electrical load the equipment is supporting. The following examples from the chart illustrate estimated diesel usage at different generator sizes.
20kW Diesel Generator Fuel Consumption
A 20kW diesel generator uses approximately 0.9 gallons per hour at 50% load and 1.6 gallons per hour at full load, based on the chart. Actual consumption may vary depending on the generator model and operating conditions.
250kW Diesel Generator Fuel Consumption
A 250kW diesel generator consumes approximately 9.5 gallons per hour at 50% load, 13.6 gallons at 75% load, and 18 gallons per hour at full load. These estimates can help businesses plan fuel requirements for temporary power and backup generator applications.
2000kW Generator Fuel Consumption
A 2000kW diesel generator uses approximately 72.2 gallons per hour at 50% load and 141.9 gallons per hour at full load, according to the chart. Large industrial generators require careful fuel planning, especially during extended operations or emergency power deployments. If you’re comparing generator sizes for an upcoming project, explore our industrial generator rental options to find equipment suited to your power requirements.
For emergency power deployments, fuel planning is especially critical. A 100kW diesel generator running at 75% load burns roughly 5.8 gallons per hour, which means extended outages require fuel scheduling to keep critical systems online. If a power outage has already hit your facility, emergency diesel generator rental support can help coordinate temporary power capacity, load requirements, runtime planning, fuel logistics, and deployment details across Houston and the Gulf Coast.