Fuel tools
Free · instant · embeddableFuel consumption & cost calculator
Estimate diesel consumption and total job cost from horsepower and load, or from a known hourly rate. Built for farmers budgeting field work, custom operators quoting jobs, and fleet managers comparing machines.
Transparent method
How this calculator works
Diesel engines burn fuel roughly in proportion to the power they are actually producing, not their rated maximum. So the estimate starts with your tractor's rated horsepower, scales it by a load factor (how hard the engine works on average during the job), and multiplies by a typical diesel consumption figure of 0.056 gallons per horsepower-hour. That yields gallons per hour; hours worked and fuel price turn it into total gallons and total cost.
A worked example: a 150 HP tractor at a 75% load factor burns about 6.3 gallons per hour. Over an 8-hour day that is roughly 50 gallons, or about $214 of diesel at $4.25 per gallon.
If you already know your machine's real burn rate, use By Known Rate mode instead: measured gallons per hour will always beat an estimate, since actual consumption depends on the engine, ballast, ground conditions, and implement match.
Not sure what your tractor is rated at? Look it up on its spec page: browse by horsepower class below or by manufacturer.
FAQ
Frequently asked questions
Where does the fuel estimate come from?
In By Horsepower mode the calculator multiplies rated engine horsepower by your load factor and by 0.056 gallons per horsepower-hour, a typical specific fuel consumption figure for diesel tractor engines. Multiplying that hourly burn by hours worked gives total gallons, and by your fuel price gives total cost.
How accurate is the estimate for my tractor?
It is a planning estimate. Real-world burn varies with engine design and condition, ballast, terrain, and how well the implement matches the tractor. If you know your machine’s actual gallons per hour from a fuel monitor or tank records, switch to By Known Rate mode and enter it directly.
What load factor should I use?
Heavy drawbar work such as chisel plowing, ripping, or deep tillage typically runs 80 to 100%. Planting, baling, and rotary cutting usually fall between 50 and 75%. Light loader work, raking, and road transport are often 30 to 50%. When in doubt, 75% is a reasonable field-work default.
Can I calculate in liters instead of gallons?
The inputs are US gallons and dollars per gallon. To work in liters, multiply the gallon results by 3.785, and convert your local price by multiplying dollars per liter by 3.785 to get dollars per gallon.
Where do I find my tractor’s rated horsepower?
Every model page in our database lists rated engine power alongside the rest of the spec sheet. Search for your model or browse the manufacturer and horsepower-class pages to look it up.
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