CarvicoToyota Prius Prime
Every EPA figure for the 2017–2025 Toyota Prius Prime, and a calculator that turns them into your cost per mile — because the headline number on the window sticker is an average of two very different cars, weighted by a guess about your driving.
What it costs you
The EPA prints 48 MPG and 114 MPGe for this car, then blends them into 79 by assuming 68% of your miles run on electricity. Change that one assumption to match your life and the answer moves a long way. Nothing here is stored or sent anywhere.
Every model year
Straight from the EPA certification database, one row per year. "EPA assumes electric" is the
combinedUF column — the share of miles the rating credits to the battery.
| Year | Gas only | MPGe | EPA assumes electric | Electric range | kWh/100mi | Prius Hybrid |
|---|---|---|---|---|---|---|
| 2017 | 54 | 133 | 53% | 25 | 25 | 52 |
| 2018 | 54 | 133 | 53% | 25 | 25 | 52 |
| 2019 | 54 | 133 | 53% | 25 | 25 | 52 |
| 2020 | 54 | 133 | 53% | 25 | 25 | 52 |
| 2021 | 54 | 133 | 53% | 25 | 25 | 52 |
| 2022 | 54 | 133 | 53% | 25 | 25 | 52 |
| 2023 | 48 | 114 | 68% | 40 | 29 | 57 |
| 2024 | 48 | 114 | 68% | 40 | 29 | 57 |
| 2025 | 48 | 114 | 68% | 40 | 29 | 57 |
What drivers report
Owners who use the EPA's own My MPG tool have filed figures for this car. That is 51 people in total — small enough that these are anecdotes, not an average. They are here because they are the only owner-reported numbers that exist in public federal data, not because they settle anything.
| Year | Drivers | Average reported | Spread |
|---|---|---|---|
| 2017 | 23 | 100.3 | 38–309 |
| 2018 | 9 | 144.9 | 67–253 |
| 2019 | 2 | 90.3 | 85–96 |
| 2020 | 4 | 85.9 | 64–131 |
| 2021 | 8 | 108.6 | 65–283 |
| 2022 | 1 | 90.4 | 90–90 |
| 2023 | 1 | 47.2 | 47–47 |
| 2024 | 2 | 59.7 | 53–68 |
| 2025 | 1 | 188.0 | 188–188 |
Why some of these look impossible
Across the EPA's plug-in data, drivers have filed averages like 558 and even 1,174 MPG. Those are not typos. MPG is miles divided by gallons, and a plug-in owner who charges every night buys almost no gasoline — so the divisor approaches zero and the number runs away. MPG cannot describe a plug-in hybrid. That is the whole reason the calculator above works in cost per mile instead.
How this is worked out
Cost per mile is the only metric that survives a car with two fuel tanks:
+ (1 − electric share) × (price per gallon ÷ gas-only MPG)
Your electric share is your daily electric miles divided by your daily miles, where daily
electric miles is capped at the car's 40-mile rated range per charge. The
kWh figure is EPA's combE, measured at the wall, so charging losses
are already inside it — you are not paying for them twice.
Every figure on this page comes from the U.S. EPA's public fuel economy database and its web services, both federal public-domain data. We add no estimates of our own. Where a number is missing it shows as a dash rather than a guess.
Add your own numbers
The gap on this page is real driving. Federal data has, at most, a handful of drivers per car, and no service or repair figures at all. If you own one, send what you actually get — it goes on this page with the count shown honestly next to it.
The app behind the guides
Carvico is a private car logbook for iPhone: fuel with real full-tank MPG, service history, receipt scanning, reminders that use miles and months, and CSV/PDF export. Your records stay on your iPhone and your own iCloud — we run no server that holds them.
Download on theApp Store