Fuel tank capacity for the John Deere 790 is 6.29 gal (23.8 L). That equals 3.14 gal (11.9 L) at half tank, with diesel listed as the fuel type.
Fuel tank capacity6.29 gal (23.8 L)Empty-to-full tank amount
Half tank3.14 gal (11.9 L)Planning guide
5-gal cansabout 2 x 5-gal cans to have enough fuel from emptyPortable fuel estimate
Fuel typedieselUse correct fuel
John Deere 790 fuel tank capacity specs
Fuel tank capacity
6.29 gal (23.8 L)
Fuel capacity in litres
23.8 L
Half tank amount
3.14 gal (11.9 L)
5-gallon fuel cans
about 2 x 5-gal cans to have enough fuel from empty
10-litre fuel jugs
3 x 10-L jugs
Fuel type
diesel
Estimated full tank fuel weight
45 lb (20 kg) of diesel
Engine horsepower
30 hp
Engine displacement
91 cu in (1.49 L)
Fuel capacity per horsepower
0.21 gal per hp
Fuel capacity is a tank-size figure. Actual top-up amount and runtime depend on remaining fuel, workload, throttle use, terrain and machine condition.
John Deere 790 fuel planning notes
Fuel capacity note
The useful refueling spec here is 6.29 gal (23.8 L). It tells you tank size; it does not guarantee hours of operation under load.
Refill planning
For an empty-to-full refill on the John Deere 790, plan for about 2 x 5-gal cans or 3 x 10-L jugs. Real fill amount can be slightly lower if fuel remains in the tank.
Fuel type note
The John Deere 790 fuel type is diesel. Wrong fuel is a much bigger problem than a slightly short top-up.
Full tank weight
For transport and storage planning, the John Deere 790 full tank fuel load is roughly 45 lb (20 kg) of diesel. Actual weight varies slightly by fuel blend and temperature.
Engine context
The John Deere 790 engine specs listed with this page are engine horsepower 30 hp, engine displacement 91 cu in (1.49 L), and tank-to-power ratio 0.21 gal per hp. They help compare models but are not a fuel-consumption rating.
Fuel tank capacity guide
This model
6.29 gal
Guide low
4 gal
Guide typical
12 gal
Guide high
30 gal
Compared with a broad Small / older tractor guide, not the full tractor dataset.
John Deere 790 fuel capacity FAQ
What is the full tank capacity for the John Deere 790?
The listed fuel capacity for the John Deere 790 is 6.29 gal (23.8 L). Treat it as the full tank size when planning fuel.
How many litres of fuel does the John Deere 790 hold?
The John Deere 790 fuel tank is 6.29 gal (23.8 L), which converts to about 23.8 litres.
What is the half-tank amount for the John Deere 790?
A half tank on the John Deere 790 works out to roughly 3.14 gal (11.9 L), based on the listed 6.29 gal (23.8 L) full capacity.
How many fuel cans are needed to fill the John Deere 790?
The John Deere 790 fuel capacity works out to about 2 x 5-gal cans or 3 x 10-L jugs. A normal top-up usually takes less.
Does the John Deere 790 use gasoline?
For the John Deere 790, fuel type is listed as diesel. Do not assume diesel or gasoline without checking the machine label and manual.
How far can the John Deere 790 go on a tank?
You cannot get a reliable runtime from tank size alone. The John Deere 790 fuel capacity is 6.29 gal (23.8 L), but fuel burn depends on utility tractor work.
Is the John Deere 790 fuel tank big enough for regular use?
The John Deere 790 falls into a small / utility-size tank range at 6.29 gal (23.8 L). Use that to decide whether portable cans or pump refueling makes more sense.
Official information note
Mistakes do happen. Check the operator manual, service manual and official deere.com website for official fuel capacity specifications.
