The 2021 Ram 1500 has a fuel tank capacity of 23.0 to 33.0 gallons (87–125 liters), depending on the trim. The most common size is 26.0 gallons, used on 27 trims.
A full tank is good for roughly 462–858 highway miles or 330–598 miles around town, going by the EPA ratings.
020 gal40 gal
33.0 gal · Bigger than 97% of 2021 models we list.
Tank figures are the manufacturer's rated capacity, sorted smallest tank first. Range is tank size times EPA city or highway MPG.
How far a 2021 Ram 1500 goes on a tank
Gallons left and the distance they cover at each mark on the fuel gauge, at EPA city and highway mileage. At the combined rating of 21 MPG, a full 26.0-gallon tank covers about 546 miles.
Gauge
Gallons
Highway miles
City miles
Full
26.0
624
494
3/4
19.5
468
371
1/2
13.0
312
247
1/4
6.5
156
124
1/8
3.3
78
62
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 714 gallons, roughly 27 full tanks.
Fuel gauges aren't perfectly linear and the low-fuel light comes on with a few gallons still in the tank, so plan your stop before the last eighth.
At 33.0 gallons, the 1500's largest tank ranks third of the six 2021 pickups compared here. The Toyota Tundra carries the most (38.0 gal) and the Nissan Titan the least (26.0 gal).
Picked by body style and size: other 2021 pickups within about 5% of the 1500's length and 15% of its curb weight, one model per brand.
2021 Ram 1500 fuel system recalls
NHTSA lists 1 fuel-system recall for the 2021 Ram 1500, out of 15 recalls in total. A recall applies only to the vehicles named in it, so check your VIN.
Chrysler (FCA US, LLC) is recalling certain 2020-2022 Jeep Wrangler, Ram 1500, and 2021-2022 Jeep Gladiator vehicles equipped with 3.0L diesel engines. The high pressure fuel pump (HPFP) may fail, causing an engine stall.
Risk and remedy
Risk: An engine stall can increase the risk of a crash.
Remedy: Dealers will replace the HPFP and inspect and replace additional fuel system components, as necessary, free of charge. Owner notification letters were mailed October 17, 2023. Owners may contact Chrysler customer service at 1-800-853-1403. Chrysler's number for this recall is Z96.
What is the fuel tank capacity of the 2021 Ram 1500?
The 2021 Ram 1500 holds between 23.0 and 33.0 gallons, depending on the trim. 26.0 gallons is the usual size; the 33.0-gallon tank comes on the TRX 4dr Crew Cab 4WD SB (6.2L 8cyl S/C 8A).
How many gallons and liters does the 2021 Ram 1500 gas tank hold?
The 2021 Ram 1500 tank holds 87–125 liters, or 23.0–33.0 gallons in US gallons.
Which 2021 Ram 1500 has the biggest gas tank?
The 33.0-gallon tank is on the TRX 4dr Crew Cab 4WD SB. The smallest tank, 23.0 gallons, is on the Big Horn 4dr Quad Cab 4WD SB.
Does the 2021 Ram 1500 tank change with the powertrain?
Yes. Gas: 23.0–33.0 gal; Diesel: 26.0 gal.
Does 4WD change the 2021 Ram 1500 gas tank?
Yes. 4WD: 23.0–33.0 gal; RWD: 23.0–26.0 gal.
How far can a 2021 Ram 1500 go on a full tank?
About 462–858 miles on the highway and 330–598 miles in town, going from full to empty at its EPA ratings. Expect less in practice, since nobody runs the tank dry.
How many miles can a 2021 Ram 1500 go on a quarter tank?
About 156 highway miles or 124 in town from the 26.0-gallon tank, which has roughly 6.5 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2021 Ram 1500 take?
Regular unleaded, or Diesel fuel, or Premium unleaded (required), depending on the engine. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2021 Ram 1500?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 26.0-gallon tank from empty costs $111.02. It ranges from $96.20 in the Gulf Coast to $153.14 in California.
How much does a full tank of gas weigh in a 2021 Ram 1500?
About 205 pounds for the 33.0-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2021 Ram 1500 have a bigger gas tank than the Chevrolet Silverado 1500?
Yes. The 2021 Ram 1500 holds up to 33.0 gallons; the 2021 Chevrolet Silverado 1500 holds up to 28.0.
Has the 2021 Ram 1500 had a fuel pump or fuel system recall?
Yes. NHTSA lists 1 fuel-system recall for the 2021 Ram 1500: 22V767000 (delivery · fuel pump). Check your VIN at nhtsa.gov/recalls to see if your car is affected.
Sources
Tank sizes: manufacturer-rated capacities from US-market specifications, cross-checked against a second spec database. Updated October 2026.
MPG and range: EPA ratings (fueleconomy.gov). Range is tank size times EPA MPG.