2018 Kia Niro Plug-In Hybrid Gas Tank Size & Fuel Capacity
Fuel tank capacity
11.3gal · 43 L
The 2018 Kia Niro Plug-In Hybrid has a fuel tank capacity of 11.3 gallons (43 liters) on every trim.
A full tank is good for roughly 497 highway miles or 542 miles around town, going by the EPA ratings.
11.3 gal · Smaller than 96% of 2018 models we list.
Listed separately: 2018 Kia Niro (11.9 gal).
2018 Kia Niro Plug-In Hybrid fuel tank capacity by trim
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| EX 4dr SUV 1.6L 4cyl 6AM · FWD Plug-in hybrid MPG 48 / 44Range 542 / 497 mi | 1.6L 4cyl 6AM Plug-in hybrid | FWD | 11.3 gal43 L | 48 / 44 | 542 / 497 mi | |
| EX Premium 4dr SUV 1.6L 4cyl 6AM · FWD Plug-in hybrid MPG 48 / 44Range 542 / 497 mi | 1.6L 4cyl 6AM Plug-in hybrid | FWD | 11.3 gal43 L | 48 / 44 | 542 / 497 mi | |
| LX 4dr SUV 1.6L 4cyl 6AM · FWD Plug-in hybrid MPG 48 / 44Range 542 / 497 mi | 1.6L 4cyl 6AM Plug-in hybrid | FWD | 11.3 gal43 L | 48 / 44 | 542 / 497 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 2018 Kia Niro Plug-In Hybrid 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 46 MPG, a full 11.3-gallon tank covers about 520 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 11.3 | 497 | 542 |
| 3/4 | 8.5 | 373 | 407 |
| 1/2 | 5.7 | 249 | 271 |
| 1/4 | 2.8 | 124 | 136 |
| 1/8 | 1.4 | 62 | 68 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 326 gallons, roughly 29 full tanks.
In real driving: owners who log fill-ups at fueleconomy.gov average 65.5 MPG in the Niro Plug-In Hybrid (5 drivers), about 740 miles on a full 11.3-gallon tank.
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
- 46 MPG
- Tailpipe CO2
- 90 g/mi
- EPA greenhouse score
- 10 of 10
- Source
- EPA ratings
What it costs to fill up a 2018 Kia Niro Plug-In Hybrid
$48.25 to fill the 11.3-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 |
|---|---|---|---|---|
| 11.3 gal | Regular | $4.27 | $48.25 | $36.19 |
By region, 11.3-gallon tank
| Region | Regular / gal | Fill from empty |
|---|---|---|
| East Coast | $4.02 | $45.43 |
| Midwest | $4.27 | $48.25 |
| Gulf CoastLowest | $3.70 | $41.81 |
| Rocky Mountain | $4.46 | $50.40 |
| West Coast | $5.42 | $61.25 |
| CaliforniaHighest | $5.89 | $66.56 |
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
- 11.3-gallon tank$48.25
- A year of driving (15,000 mi)$1,392
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
Niro Plug-In Hybrid tank size in other years
2018 is the first Niro Plug-In Hybrid model year we list.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2023 Niro Plug-In Hybrid | 9.8 gal | 461 mi |
| 2022 Niro Plug-In Hybrid | 11.4 gal | 502 mi |
| 2021 Niro Plug-In Hybrid | 11.4 gal | 502 mi |
| 2020 Niro Plug-In Hybrid | 11.4 gal | 502 mi |
| 2019 Niro Plug-In Hybrid | 11.3 gal | 497 mi |
| 2018 Niro Plug-In Hybrid | 11.3 gal | 497 mi |
2018 Kia Niro Plug-In Hybrid vs similar 2018 SUVs
The Niro Plug-In Hybrid has the smallest tank of the seven 2018 SUVs compared here: 11.3 gallons, against 16.6 for the Mitsubishi Eclipse Cross.
| 2018 model | Tank | Longest highway range |
|---|---|---|
| Mitsubishi Eclipse Cross | 15.8–16.6 gal | 481 mi |
| Hyundai Tucson | 16.4 gal | 492 mi |
| Nissan Rogue Sport | 14.5 gal | 464 mi |
| Jeep Compass | 13.5 gal | 432 mi |
| Toyota C-HR | 13.2 gal | 409 mi |
| FIAT 500X | 12.7 gal | 419 mi |
| Kia Niro Plug-In Hybrid | 11.3 gal | 497 mi |
Other 2018 SUVs of a similar size, one model per brand.
Frequently asked questions
What is the fuel tank capacity of the 2018 Kia Niro Plug-In Hybrid?
The 2018 Kia Niro Plug-In Hybrid holds 11.3 gallons (43 liters) on every trim we list.
How many gallons and liters does the 2018 Kia Niro Plug-In Hybrid gas tank hold?
The 2018 Kia Niro Plug-In Hybrid tank holds 43 liters, or 11.3 gallons in US gallons.
How far can a 2018 Kia Niro Plug-In Hybrid go on a full tank?
About 497 miles on the highway and 542 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 2018 Kia Niro Plug-In Hybrid go on a quarter tank?
About 124 highway miles or 136 in town from the 11.3-gallon tank, which has roughly 2.8 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
How many miles does a 2018 Kia Niro Plug-In Hybrid really get on a tank?
Drivers who log their fill-ups at fueleconomy.gov average 65.5 MPG in the 2018 Kia Niro Plug-In Hybrid (5 drivers), which works out to about 740 miles on a full 11.3-gallon tank.
What gas does the 2018 Kia Niro Plug-In Hybrid take?
Regular unleaded. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2018 Kia Niro Plug-In Hybrid?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 11.3-gallon tank from empty costs $48.25. It ranges from $41.81 in the Gulf Coast to $66.56 in California.
How much does a full tank of gas weigh in a 2018 Kia Niro Plug-In Hybrid?
About 70 pounds for the 11.3-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2018 Kia Niro Plug-In Hybrid have a bigger gas tank than the Nissan Rogue Sport?
No. The 2018 Nissan Rogue Sport holds up to 14.5 gallons; the 2018 Kia Niro Plug-In Hybrid holds up to 11.3.
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).
- Real-world MPG: driver-reported fill-ups shared at fueleconomy.gov (My MPG).
Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.