How far can Toyota Mirai go on 1kg of hydrogen?
On today’s Toyota Mirai models, you can expect roughly 70 miles (about 115 kilometers) per kilogram of hydrogen. With a full tank of about 5.6 kilograms, that translates to around 400 miles of range under EPA testing, though real-world results vary with conditions.
Context and what governs the number
The Mirai is a hydrogen fuel cell electric vehicle. Its range per kilogram depends on the car’s efficiency, which is influenced by year, tank size, drivetrain tuning, and real-world driving conditions. Toyota publishes EPA ranges that reflect laboratory-style testing, while drivers may see higher or lower figures in daily use.
Range per kilogram across generations
Before comparing numbers, it helps to note the evolution of the Mirai’s hydrogen capacity and official range estimates. The latest generation ships with a larger hydrogen storage system and updated powertrain that together influence how far you can go per unit of hydrogen.
- Current-generation Mirai (2021–present): EPA-estimated range around 402 miles on a full tank. Tank size is about 5.6 kilograms, which works out to roughly 71–72 miles per kilogram (about 115 km per kilogram).
- Earlier generations (roughly 2016–2020): EPA-estimated range around 312 miles on a full tank, with a tank around 5 kilograms. That yields about 62 miles per kilogram (about 100 km per kilogram).
- Bottom line for per-kilogram numbers: newer Mirai models typically sit in the ~70 miles per kilogram range, with older versions closer to ~60 miles per kilogram, depending on conditions and market.
These figures reflect standardized testing and can differ from what drivers experience, but they offer a consistent baseline for comparing generations and understanding how far 1 kilogram of hydrogen can take you.
Real-world factors that affect the range per kilogram
In everyday driving, several variables can stretch or shrink the Mirai’s per-kilogram efficiency. Understanding them helps translate laboratory figures into practical expectations.
- Driving speed and style: Higher speeds and rapid acceleration increase energy use, reducing kilometers per kilogram.
- Ambient temperature and climate control: Cold weather or heavy use of the heater can lower efficiency; moderate temperatures and minimal climate control preserve range.
- Topography: Hilly or mountainous terrain consumes more hydrogen than flat driving.
- Payload and aerodynamics: Extra weight and less aerodynamic load reduce efficiency.
- Tire condition and rolling resistance: Under-inflated or worn tires raise energy consumption.
- Hydrogen purity and system health: Degraded fuel quality or maintenance issues can affect fuel cell efficiency.
In short, real-world range per kilogram is commonly lower than the EPA laboratory numbers in challenging conditions, while conservative, steady driving can bring you closer to the published figures.
How to estimate your Mirai’s range in practice
Practical steps and tips
Use the vehicle’s energy consumption displays to gauge how many kilograms you’ll need for a given trip, and remember to account for seasonality, terrain, and driving behavior. If you know your typical highway cruising speed and climate control use, you can approximate a per-kilogram range and plan refueling stops accordingly.
Summary: A practical rule of thumb for the Mirai is about 70 miles per kilogram of hydrogen in modern models, equating to roughly 115 kilometers per kilogram. A full tank of around 5.6 kilograms yields about 400 miles (approximately 650 kilometers) of EPA-rated range, with real-world results varying by conditions and driving habits.
Bottom line for planners and drivers
For anyone considering a hydrogen-powered future with the Mirai, the key takeaway is that hydrogen efficiency translates into solid per-kilogram ranges, but actual distance per kilogram depends on how you drive and where you drive. If you’re budgeting trips, plan for close to the EPA figures but stay flexible for weather, terrain, and usage of climate controls.
Summary
The Toyota Mirai delivers about 70 miles per kilogram of hydrogen in current models, equating to roughly 115 km per kilogram. With a 5.6 kg tank, the EPA-rated range is around 400 miles, though real-world range will vary with speed, temperature, terrain, and load. This makes the Mirai a viable long-range option among hydrogen-powered vehicles, with performance that improves slightly in newer generations but remains sensitive to driving conditions.
