2021 Mazda 3 Gas Tank Size & Fuel Capacity
Fuel tank capacity
12.7–13.2gal · 48–50 L
The 2021 Mazda 3 has a fuel tank capacity of 12.7 to 13.2 gallons (48–50 liters), depending on the trim. The most common size is 13.2 gallons, used on 8 trims.
A full tank is good for roughly 394–475 highway miles or 292–370 miles around town, going by the EPA ratings.
13.2 gal · Smaller than 90% of 2021 models we list.
2021 Mazda 3 fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Drive
- Engine
All 16 trims
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| 2.5 Turbo 4dr Hatchback AWD 2.5L 4cyl Turbo 6A · AWD MPG 23 / 31Range 292 / 394 mi | 2.5L 4cyl Turbo 6A | AWD | 12.7 gal48 L | 23 / 31 | 292 / 394 mi | |
| 2.5 Turbo 4dr Sedan AWD 2.5L 4cyl Turbo 6A · AWD MPG 23 / 32Range 292 / 406 mi | 2.5L 4cyl Turbo 6A | AWD | 12.7 gal48 L | 23 / 32 | 292 / 406 mi | |
| 2.5 Turbo Premium Plus 4dr Hatchback AWD 2.5L 4cyl Turbo 6A · AWD MPG 23 / 31Range 292 / 394 mi | 2.5L 4cyl Turbo 6A | AWD | 12.7 gal48 L | 23 / 31 | 292 / 394 mi | |
| 2.5 Turbo Premium Plus 4dr Sedan AWD 2.5L 4cyl Turbo 6A · AWD MPG 23 / 32Range 292 / 406 mi | 2.5L 4cyl Turbo 6A | AWD | 12.7 gal48 L | 23 / 32 | 292 / 406 mi | |
| Preferred 4dr Hatchback AWD 2.5L 4cyl 6A · AWD MPG 25 / 31Range 318 / 394 mi | 2.5L 4cyl 6A | AWD | 12.7 gal48 L | 25 / 31 | 318 / 394 mi | |
| Preferred 4dr Sedan AWD 2.5L 4cyl 6A · AWD MPG 25 / 33Range 318 / 419 mi | 2.5L 4cyl 6A | AWD | 12.7 gal48 L | 25 / 33 | 318 / 419 mi | |
| Premium 4dr Hatchback AWD 2.5L 4cyl 6A · AWD MPG 25 / 31Range 318 / 394 mi | 2.5L 4cyl 6A | AWD | 12.7 gal48 L | 25 / 31 | 318 / 394 mi | |
| Premium 4dr Sedan AWD 2.5L 4cyl 6A · AWD MPG 25 / 33Range 318 / 419 mi | 2.5L 4cyl 6A | AWD | 12.7 gal48 L | 25 / 33 | 318 / 419 mi | |
| 2.0 4dr Sedan 2.0L 4cyl 6A · FWD MPG 28 / 36Range 370 / 475 mi | 2.0L 4cyl 6A | FWD | 13.2 gal50 L | 28 / 36 | 370 / 475 mi | |
| 2.5 S 4dr Hatchback 2.5L 4cyl 6A · FWD MPG 26 / 34Range 343 / 449 mi | 2.5L 4cyl 6A | FWD | 13.2 gal50 L | 26 / 34 | 343 / 449 mi | |
| 2.5 S 4dr Sedan 2.5L 4cyl 6A · FWD MPG 26 / 35Range 343 / 462 mi | 2.5L 4cyl 6A | FWD | 13.2 gal50 L | 26 / 35 | 343 / 462 mi | |
| Preferred 4dr Hatchback 2.5L 4cyl 6A · FWD MPG 26 / 34Range 343 / 449 mi | 2.5L 4cyl 6A | FWD | 13.2 gal50 L | 26 / 34 | 343 / 449 mi | |
| Preferred 4dr Sedan 2.5L 4cyl 6A · FWD MPG 26 / 35Range 343 / 462 mi | 2.5L 4cyl 6A | FWD | 13.2 gal50 L | 26 / 35 | 343 / 462 mi | |
| Premium 4dr Hatchback 2.5L 4cyl 6A · FWD MPG 26 / 34Range 343 / 449 mi | 2.5L 4cyl 6A | FWD | 13.2 gal50 L | 26 / 34 | 343 / 449 mi | |
| Premium 4dr Hatchback 2.5L 4cyl 6M · FWD MPG 24 / 33Range 317 / 436 mi | 2.5L 4cyl 6M | FWD | 13.2 gal50 L | 24 / 33 | 317 / 436 mi | |
| Premium 4dr Sedan 2.5L 4cyl 6A · FWD MPG 26 / 35Range 343 / 462 mi | 2.5L 4cyl 6A | FWD | 13.2 gal50 L | 26 / 35 | 343 / 462 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 Mazda 3 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 29 MPG, a full 13.2-gallon tank covers about 383 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 13.2 | 449 | 343 |
| 3/4 | 9.9 | 337 | 257 |
| 1/2 | 6.6 | 224 | 172 |
| 1/4 | 3.3 | 112 | 86 |
| 1/8 | 1.7 | 56 | 43 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 517 gallons, roughly 39 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
- 26–31 MPG
- Tailpipe CO2
- 287–337 g/mi
- EPA greenhouse score
- 5–7 of 10
- Source
- EPA ratings
What it costs to fill up a 2021 Mazda 3
$56.36 to fill the 13.2-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 |
|---|---|---|---|---|
| 12.7 gal | Regular | $4.27 | $54.23 | $40.67 |
| 13.2 gal | Regular | $4.27 | $56.36 | $42.27 |
By region, 13.2-gallon tank
| Region | Regular / gal | Fill from empty |
|---|---|---|
| East Coast | $4.02 | $53.06 |
| Midwest | $4.27 | $56.36 |
| Gulf CoastLowest | $3.70 | $48.84 |
| Rocky Mountain | $4.46 | $58.87 |
| West Coast | $5.42 | $71.54 |
| CaliforniaHighest | $5.89 | $77.75 |
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
- 12.7-gallon tank$54.23
- 13.2-gallon tank$56.36
- A year of driving (15,000 mi)$2,209
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
3 tank size in other years
The 2021 3 uses the same 12.7–13.2 gal tank sizes as every 3 since 2019.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2026 3 | 12.7–13.2 gal | 475 mi |
| 2025 3 | 12.7–13.2 gal | 488 mi |
| 2024 3 | 12.7–13.2 gal | 488 mi |
| 2023 3 | 12.7–13.2 gal | 488 mi |
| 2022 3 | 12.7–13.2 gal | 475 mi |
| 2021 3 | 12.7–13.2 gal | 475 mi |
| 2020 3 | 12.7–13.2 gal | 475 mi |
| 2019 3 | 12.7–13.2 gal | 475 mi |
| 2018 3 | 13.2 gal | 502 mi |
| 2017 3 | 13.2 gal | 488 mi |
| 2016 3 | 13.2 gal | 541 mi |
2021 Mazda 3 vs similar 2021 sedans
The 3 has the largest tank of the five 2021 sedans compared here, 13.2 gallons against 13.2 for the Subaru Impreza.
| 2021 model | Tank | Longest highway range |
|---|---|---|
| Mazda 3 | 12.7–13.2 gal | 475 mi |
| Subaru Impreza | 13.2 gal | 475 mi |
| Honda Civic | 12.4 gal | 521 mi |
| Toyota Prius Prime | 11.4 gal | 604 mi |
| Hyundai Ioniq Plug-In Hybrid | 11.4 gal | 581 mi |
Other 2021 sedans of a similar size, one model per brand.
Frequently asked questions
What is the fuel tank capacity of the 2021 Mazda 3?
The 2021 Mazda 3 holds between 12.7 and 13.2 gallons, depending on the trim. 13.2 gallons is the usual size; the smaller 12.7-gallon tank is on the 2.5 Turbo 4dr Hatchback AWD.
How many gallons and liters does the 2021 Mazda 3 gas tank hold?
The 2021 Mazda 3 tank holds 48–50 liters, or 12.7–13.2 gallons in US gallons.
Which 2021 Mazda 3 has the biggest gas tank?
The 13.2-gallon tank is on the 2.0 4dr Sedan, 2.5 S 4dr Hatchback, 2.5 S 4dr Sedan and 5 other trims. The smallest tank, 12.7 gallons, is on the 2.5 Turbo 4dr Hatchback AWD.
Does AWD change the 2021 Mazda 3 gas tank?
Yes. AWD: 12.7 gal; FWD: 13.2 gal.
How far can a 2021 Mazda 3 go on a full tank?
About 394–475 miles on the highway and 292–370 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 Mazda 3 go on a quarter tank?
About 112 highway miles or 86 in town from the 13.2-gallon tank, which has roughly 3.3 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2021 Mazda 3 take?
Regular unleaded. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2021 Mazda 3?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 13.2-gallon tank from empty costs $56.36. It ranges from $48.84 in the Gulf Coast to $77.75 in California.
How much does a full tank of gas weigh in a 2021 Mazda 3?
About 82 pounds for the 13.2-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2021 Mazda 3 have a bigger gas tank than the Toyota Prius Prime?
Yes. The 2021 Mazda 3 holds up to 13.2 gallons; the 2021 Toyota Prius Prime holds up to 11.4.
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.