2021 Ram 1500 Classic Gas Tank Size & Fuel Capacity
Fuel tank capacity
26.0–32.0gal · 98–121 L
The 2021 Ram 1500 Classic has a fuel tank capacity of 26.0 to 32.0 gallons (98–121 liters), depending on the trim. The most common size is 26.0 gallons, used on 26 trims.
A full tank is good for roughly 546–800 highway miles or 390–544 miles around town, going by the EPA ratings.
32.0 gal · Bigger than 96% of 2021 models we list.
Listed separately: 2021 Ram 1500 (23.0–33.0 gal).
- By trim
- Gas cap & parts
- Fuel essentials
- Miles per tank
- Fill-up cost
- Other years
- Compared
- Pump & gauge parts
- FAQ
2021 Ram 1500 Classic fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Drive
- no difference
- Cab
- Bed
- Engine
All 30 trims
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| Express 2dr Regular Cab 4WD SB 3.6L 6cyl 8A · 4WD MPG 16 / 23Range 416 / 598 mi | 3.6L 6cyl 8A | 4WD | 26.0 gal98 L | 16 / 23 | 416 / 598 mi | |
| Express 2dr Regular Cab SB 3.6L 6cyl 8A · RWD MPG 17 / 25Range 442 / 650 mi | 3.6L 6cyl 8A | RWD | 26.0 gal98 L | 17 / 25 | 442 / 650 mi | |
| Express 4dr Crew Cab 4WD 5.6 ft SB 3.6L 6cyl 8A · 4WD MPG 16 / 23Range 416 / 598 mi | 3.6L 6cyl 8A | 4WD | 26.0 gal98 L | 16 / 23 | 416 / 598 mi | |
| Express 4dr Crew Cab 5.6 ft SB 3.6L 6cyl 8A · RWD MPG 17 / 25Range 442 / 650 mi | 3.6L 6cyl 8A | RWD | 26.0 gal98 L | 17 / 25 | 442 / 650 mi | |
| Express 4dr Quad Cab 4WD SB 3.6L 6cyl 8A · 4WD MPG 16 / 23Range 416 / 598 mi | 3.6L 6cyl 8A | 4WD | 26.0 gal98 L | 16 / 23 | 416 / 598 mi | |
| Express 4dr Quad Cab SB 3.6L 6cyl 8A · RWD MPG 17 / 25Range 442 / 650 mi | 3.6L 6cyl 8A | RWD | 26.0 gal98 L | 17 / 25 | 442 / 650 mi | |
| SLT Fleet 2dr Regular Cab 4WD SB 3.6L 6cyl 8A · 4WD MPG 16 / 23Range 416 / 598 mi | 3.6L 6cyl 8A | 4WD | 26.0 gal98 L | 16 / 23 | 416 / 598 mi | |
| SLT Fleet 2dr Regular Cab SB 3.6L 6cyl 8A · RWD MPG 17 / 25Range 442 / 650 mi | 3.6L 6cyl 8A | RWD | 26.0 gal98 L | 17 / 25 | 442 / 650 mi | |
| SLT Fleet 4dr Crew Cab 4WD 5.6 ft SB 3.6L 6cyl 8A · 4WD MPG 16 / 23Range 416 / 598 mi | 3.6L 6cyl 8A | 4WD | 26.0 gal98 L | 16 / 23 | 416 / 598 mi | |
| SLT Fleet 4dr Crew Cab 4WD 6.3 ft SB 5.7L 8cyl 8A · 4WD MPG 15 / 21Range 390 / 546 mi | 5.7L 8cyl 8A | 4WD | 26.0 gal98 L | 15 / 21 | 390 / 546 mi | |
| SLT Fleet 4dr Crew Cab 5.6 ft SB 3.6L 6cyl 8A · RWD MPG 17 / 25Range 442 / 650 mi | 3.6L 6cyl 8A | RWD | 26.0 gal98 L | 17 / 25 | 442 / 650 mi | |
| SLT Fleet 4dr Crew Cab 6.3 ft SB 5.7L 8cyl 8A · RWD MPG 15 / 22Range 390 / 572 mi | 5.7L 8cyl 8A | RWD | 26.0 gal98 L | 15 / 22 | 390 / 572 mi | |
| SLT Fleet 4dr Quad Cab 4WD SB 3.6L 6cyl 8A · 4WD MPG 16 / 23Range 416 / 598 mi | 3.6L 6cyl 8A | 4WD | 26.0 gal98 L | 16 / 23 | 416 / 598 mi | |
| SLT Fleet 4dr Quad Cab SB 3.6L 6cyl 8A · RWD MPG 17 / 25Range 442 / 650 mi | 3.6L 6cyl 8A | RWD | 26.0 gal98 L | 17 / 25 | 442 / 650 mi | |
| Tradesman 2dr Regular Cab 4WD SB 3.6L 6cyl 8A · 4WD MPG 16 / 23Range 416 / 598 mi | 3.6L 6cyl 8A | 4WD | 26.0 gal98 L | 16 / 23 | 416 / 598 mi | |
| Tradesman 2dr Regular Cab SB 3.6L 6cyl 8A · RWD MPG 17 / 25Range 442 / 650 mi | 3.6L 6cyl 8A | RWD | 26.0 gal98 L | 17 / 25 | 442 / 650 mi | |
| Tradesman 4dr Crew Cab 4WD 5.6 ft SB 3.6L 6cyl 8A · 4WD MPG 16 / 23Range 416 / 598 mi | 3.6L 6cyl 8A | 4WD | 26.0 gal98 L | 16 / 23 | 416 / 598 mi | |
| Tradesman 4dr Crew Cab 4WD 6.3 ft SB 5.7L 8cyl 8A · 4WD MPG 15 / 21Range 390 / 546 mi | 5.7L 8cyl 8A | 4WD | 26.0 gal98 L | 15 / 21 | 390 / 546 mi | |
| Tradesman 4dr Crew Cab 5.6 ft SB 3.6L 6cyl 8A · RWD MPG 17 / 25Range 442 / 650 mi | 3.6L 6cyl 8A | RWD | 26.0 gal98 L | 17 / 25 | 442 / 650 mi | |
| Tradesman 4dr Crew Cab 6.3 ft SB 5.7L 8cyl 8A · RWD MPG 15 / 22Range 390 / 572 mi | 5.7L 8cyl 8A | RWD | 26.0 gal98 L | 15 / 22 | 390 / 572 mi | |
| Tradesman 4dr Quad Cab 4WD SB 3.6L 6cyl 8A · 4WD MPG 16 / 23Range 416 / 598 mi | 3.6L 6cyl 8A | 4WD | 26.0 gal98 L | 16 / 23 | 416 / 598 mi | |
| Tradesman 4dr Quad Cab SB 3.6L 6cyl 8A · RWD MPG 17 / 25Range 442 / 650 mi | 3.6L 6cyl 8A | RWD | 26.0 gal98 L | 17 / 25 | 442 / 650 mi | |
| Warlock 4dr Crew Cab 4WD 5.6 ft SB 3.6L 6cyl 8A · 4WD MPG 16 / 23Range 416 / 598 mi | 3.6L 6cyl 8A | 4WD | 26.0 gal98 L | 16 / 23 | 416 / 598 mi | |
| Warlock 4dr Crew Cab 5.6 ft SB 3.6L 6cyl 8A · RWD MPG 17 / 25Range 442 / 650 mi | 3.6L 6cyl 8A | RWD | 26.0 gal98 L | 17 / 25 | 442 / 650 mi | |
| Warlock 4dr Quad Cab 4WD SB 3.6L 6cyl 8A · 4WD MPG 16 / 23Range 416 / 598 mi | 3.6L 6cyl 8A | 4WD | 26.0 gal98 L | 16 / 23 | 416 / 598 mi | |
| Warlock 4dr Quad Cab SB 3.6L 6cyl 8A · RWD MPG 17 / 25Range 442 / 650 mi | 3.6L 6cyl 8A | RWD | 26.0 gal98 L | 17 / 25 | 442 / 650 mi | |
| SLT Fleet 2dr Regular Cab 4WD LB 3.6L 6cyl 8A · 4WD MPG 16 / 23Range 512 / 736 mi | 3.6L 6cyl 8A | 4WD | 32.0 gal121 L | 16 / 23 | 512 / 736 mi | |
| SLT Fleet 2dr Regular Cab LB 3.6L 6cyl 8A · RWD MPG 17 / 25Range 544 / 800 mi | 3.6L 6cyl 8A | RWD | 32.0 gal121 L | 17 / 25 | 544 / 800 mi | |
| Tradesman 2dr Regular Cab 4WD LB 3.6L 6cyl 8A · 4WD MPG 16 / 23Range 512 / 736 mi | 3.6L 6cyl 8A | 4WD | 32.0 gal121 L | 16 / 23 | 512 / 736 mi | |
| Tradesman 2dr Regular Cab LB 3.6L 6cyl 8A · RWD MPG 17 / 25Range 544 / 800 mi | 3.6L 6cyl 8A | RWD | 32.0 gal121 L | 17 / 25 | 544 / 800 mi | |
| No trim matches all of these filters. | ||||||
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 Classic 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 19 MPG, a full 26.0-gallon tank covers about 494 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 26.0 | 598 | 416 |
| 3/4 | 19.5 | 449 | 312 |
| 1/2 | 13.0 | 299 | 208 |
| 1/4 | 6.5 | 150 | 104 |
| 1/8 | 3.3 | 75 | 52 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 789 gallons, roughly 30 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.
- EPA combined
- 17–20 MPG
- Tailpipe CO2
- 450–526 g/mi
- EPA greenhouse score
- 3–4 of 10
- Source
- EPA ratings
What it costs to fill up a 2021 Ram 1500 Classic
$111.02 to fill the 26.0-gallon tank from empty with regular, at this week's US average of $4.27 a gallon.
| Tank | Fuel | US avg / gal | From empty | From 1/4 tank |
|---|---|---|---|---|
| 26.0 gal | Regular | $4.27 | $111.02 | $83.26 |
| 32.0 gal | Regular | $4.27 | $136.64 | $102.48 |
By region, 26.0-gallon tank
| Region | Regular / gal | Fill from empty |
|---|---|---|
| East Coast | $4.02 | $104.52 |
| Midwest | $4.27 | $111.02 |
| Gulf CoastLowest | $3.70 | $96.20 |
| Rocky Mountain | $4.46 | $115.96 |
| West Coast | $5.42 | $140.92 |
| CaliforniaHighest | $5.89 | $153.14 |
Prices: U.S. Energy Information Administration retail averages for the week of October 26, 2026. This week's prices by state and city.
Your own price
- 26.0-gallon tank$111.02
- 32.0-gallon tank$136.64
- A year of driving (15,000 mi)$3,371
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
1500 Classic tank size in other years
The 2021 1500 Classic uses the same 26.0–32.0 gal tank sizes as every 1500 Classic since 2019.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2024 1500 Classic | 26.0 gal | 650 mi |
| 2023 1500 Classic | 26.0–32.0 gal | 800 mi |
| 2022 1500 Classic | 26.0–32.0 gal | 800 mi |
| 2021 1500 Classic | 26.0–32.0 gal | 800 mi |
| 2020 1500 Classic | 26.0–32.0 gal | 800 mi |
| 2019 1500 Classic | 26.0–32.0 gal | 800 mi |
2021 Ram 1500 Classic vs similar 2021 pickups
At 32.0 gallons, the 1500 Classic's largest tank ranks third of the seven 2021 pickups compared here. The Toyota Tundra carries the most (38.0 gal) and the Jeep Gladiator the least (22.0 gal).
| 2021 model | Tank | Longest highway range |
|---|---|---|
| Toyota Tundra | 26.4–38.0 gal | 646 mi |
| Ford F-150 | 23.0–36.0 gal | 676 mi |
| Ram 1500 Classic | 26.0–32.0 gal | 800 mi |
| Chevrolet Silverado 1500 | 24.0–28.0 gal | 588 mi |
| GMC Sierra 1500 | 24.0–28.0 gal | 624 mi |
| Nissan Titan | 26.0 gal | 546 mi |
| Jeep Gladiator | 22.0 gal | 506 mi |
Other 2021 pickups of a similar size, one model per brand.
2021 Ram 1500 Classic fuel pump and gauge parts
These are the part numbers the makers list for the 2021 Ram 1500 Classic. Check the fuel system recalls first: recall repairs are free.
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Frequently asked questions
What is the fuel tank capacity of the 2021 Ram 1500 Classic?
The 2021 Ram 1500 Classic holds between 26.0 and 32.0 gallons, depending on the trim. 26.0 gallons is the usual size; the 32.0-gallon tank comes on the SLT Fleet 2dr Regular Cab 4WD LB (3.6L 6cyl 8A).
How many gallons and liters does the 2021 Ram 1500 Classic gas tank hold?
The 2021 Ram 1500 Classic tank holds 98–121 liters, or 26.0–32.0 gallons in US gallons.
Which 2021 Ram 1500 Classic has the biggest gas tank?
The 32.0-gallon tank is on the SLT Fleet 2dr Regular Cab 4WD LB, SLT Fleet 2dr Regular Cab LB, Tradesman 2dr Regular Cab 4WD LB and 1 other trim. The smallest tank, 26.0 gallons, is on the Express 2dr Regular Cab 4WD SB.
Does 4WD change the 2021 Ram 1500 Classic gas tank?
No. 4WD and RWD versions of the 2021 Ram 1500 Classic use the same 26.0–32.0 gal tank.
How far can a 2021 Ram 1500 Classic go on a full tank?
About 546–800 miles on the highway and 390–544 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 Classic go on a quarter tank?
About 150 highway miles or 104 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 Classic take?
Regular unleaded. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2021 Ram 1500 Classic?
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 Classic?
About 198 pounds for the 32.0-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2021 Ram 1500 Classic have a bigger gas tank than the Chevrolet Silverado 1500?
Yes. The 2021 Ram 1500 Classic holds up to 32.0 gallons; the 2021 Chevrolet Silverado 1500 holds up to 28.0.
Sources
- Tank sizes: manufacturer-rated capacities from US-market specifications, checked against independent references. Updated October 2026.
- MPG and range: EPA ratings (fueleconomy.gov). Range is tank size times EPA MPG.
- Fuel prices: U.S. Energy Information Administration, week of October 26, 2026 (this week's prices).
Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.