EPA ratings · 2018 · Hyundai · Sonata
2018 Hyundai Sonata Fuel Economy
EPA rates the 2018 Hyundai Sonata's 7 trims from 26 to 42 MPG combined, Sonata to Sonata Hybrid SE. Electric and plug-in trims show MPGe and kWh per 100 miles. The table below prices every trim per mile at a fuel price and mileage you can change.
EPA ratings by trim
| Trim | Engine | Transmission | Drive | City | Hwy | Combined | kWh/100 mi | Electric range |
|---|---|---|---|---|---|---|---|---|
| Sonata · Regular | 2.4 L, 4 cyl | Automatic (S6) | Front-Wheel Drive | 25 | 35 | 28 MPG | — | — |
| Sonata · Regular | 2 L, 4 cyl | Automatic (S8) | Front-Wheel Drive | 23 | 32 | 26 MPG | — | — |
| Sonata · Regular | 1.6 L, 4 cyl | Automatic (AM7) | Front-Wheel Drive | 28 | 37 | 31 MPG | — | — |
| Sonata Hybrid · Regular | 2 L, 4 cyl, Hybrid | Automatic (AM6) | Front-Wheel Drive | 39 | 44 | 41 MPG | — | — |
| Sonata Hybrid SE · Regular | 2 L, 4 cyl, Hybrid | Automatic (AM6) | Front-Wheel Drive | 40 | 46 | 42 MPG | — | — |
| Sonata Plug-in Hybrid · Regular Gas and Electricity | 2 L, 4 cyl, Plug-in Hybrid | Automatic (AM6) | Front-Wheel Drive | 37 | 42 | 39 MPG | 34.0 | 28 mi |
| Sonata SE · Regular | 2.4 L, 4 cyl | Automatic (S6) | Front-Wheel Drive | 25 | 36 | 29 MPG | — | — |
City and highway are EPA's adjusted label figures; combined is the 55/45 blend printed on the window sticker. For electric and plug-in trims the MPG columns are MPGe, and the kWh per 100 miles is the figure a charging cost actually turns on; EPA measures it at the wall, so charging losses are already in it. Unrounded combined figures, where EPA publishes them: Sonata 28.4081; Sonata 25.9803; Sonata 31.1698; Sonata Hybrid 41; Sonata Hybrid SE 42; Sonata Plug-in Hybrid 39.4996; Sonata SE 29.1638.
What the rating costs per mile
The rating divided by a price, times your miles. It starts at EIA's current U.S. averages and EPA's 15,000 miles so the right-hand column is comparable; type your own pump price, home rate and mileage over them.
| Trim | Runs on | Rated | Per mile | Per year | EPA's figure |
|---|---|---|---|---|---|
| Sonata | Regular Gasoline | 28 MPG | 15.3¢ | $2,295 | $2,400 |
| Sonata | Regular Gasoline | 26 MPG | 16.5¢ | $2,472 | $2,600 |
| Sonata | Regular Gasoline | 31 MPG | 13.8¢ | $2,073 | $2,150 |
| Sonata Hybrid | Regular Gasoline | 41 MPG | 10.4¢ | $1,567 | $1,650 |
| Sonata Hybrid SE | Regular Gasoline | 42 MPG | 10.2¢ | $1,530 | $1,600 |
| Sonata Plug-in Hybrid — on gasoline | Regular Gasoline | 39 MPG | 11.0¢ | $1,648 | $1,700 |
| Sonata Plug-in Hybrid — on electricity | Electricity | 34 kWh/100 mi | 6.2¢ | $926 | — |
| Sonata SE | Regular Gasoline | 29 MPG | 14.8¢ | $2,216 | $2,300 |
Per mile = price ÷ rated MPG (gasoline) or price per kWh × kWh per 100 miles ÷ 100 (electricity). Per year = per mile × miles. EPA's figure is its own annual fuel cost at 15,000 miles, 55% city, and the national price in force when the file was built; it will differ from the middle columns whenever the price here differs. A plug-in hybrid is shown once on each fuel; its real cost sits between them, by how much of its driving is on the battery.
Fuel only — before depreciation, insurance, maintenance or tires, which the True Cost per Mile Calculator adds. Most drivers land below the rating; the True MPG Calculator measures your own from two fill-ups. The EV vs. Gas Cost Calculator sets the electric trim against a gasoline one over a year.
EPA's own figures, and why they differ
The “EPA's figure” column is EPA's annual fuel cost from the same file: 15,000 miles, 55% city, and the national fuel price fueleconomy.gov was using on the day the file was built (2026-09-29). fueleconomy.gov recomputes its page every week at the current price, so its number and the file's drift apart between file dates; the middle columns here use a price you can see and change, which is the only honest way to compare two cars. EPA also prints a five-year “you save/spend” against the average new vehicle (saves $4,000 for the Sonata Hybrid SE); it rests on the same assumptions and is not repeated here as a result.
Every figure on this page is a rating, not a measurement of any particular car. The site never calls a rating wrong; it shows what your own price and miles do to it. See the model on fueleconomy.gov.
Other model years of the Hyundai Sonata: 2027, 2026, 2025, 2024, 2023, 2022, 2021, 2020, 2019, 2017, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994, 1993, 1992, 1991, 1990, 1989.
Related tools
Price the same miles on gasoline and on electricity, using your fuel price, your utility rate, and each car's rated efficiency.
Open tool →True MPG CalculatorYour car's real fuel economy from two odometer readings and a fill-up — and how far it falls from its EPA rating.
Open tool →Commute Cost CalculatorWhat getting to work costs per day, per month, and per year — energy only, or all-in at the IRS standard mileage rate.
Open tool →Gas Prices by Region and StateThis week's average price of regular gasoline for the U.S., every state and ten cities, from EIA's weekly survey — a dated figure to start from, never one assumed for you.
Open tool →Electricity Prices by StateThe average residential price of electricity in every state, by month, from EIA's utility filings — and what each rate does to a mile in an electric car.
Open tool →Informational only — published averages for scale and comparison, not a quote for any pump, utility or vehicle. Your own price is the one that counts, and every calculator on this site takes it as an input.
Ratings: U.S. EPA and U.S. DOE, fueleconomy.gov vehicles.csv dated 2026-09-29 (EPA record ids 38663, 38719, 39063, 39898, 39899, 40066, 38664). Prices: EIA, U.S. regular gasoline week of October 19, 2026; U.S. residential electricity August 2026. Snapshots refreshed monthly.