Calculate Your Vehicle's Full Tank Range
See step-by-step calculation
The Fuel Tank Range Calculator tells you exactly how far you can drive on a full tank by multiplying your vehicle's tank capacity (in liters or gallons) by its fuel economy (km/L or MPG). The core formula is Range = Tank Capacity × Fuel Economy. Use it before long road trips, when planning fuel stops on unfamiliar routes, or to compare vehicles side-by-side. A car with a 50 L tank getting 15 km/L covers 750 km per fill-up — this calculator makes that arithmetic instant and error-free for any combination of units.
The Fuel Tank Range Calculator tells you exactly how far you can drive on a full tank by multiplying your vehicle's tank capacity (in liters or gallons) by its fuel economy (km/L or MPG). The core formula is Range = Tank Capacity × Fuel Economy.
When to use this calculator
- Planning fuel stops on a long highway road trip to avoid running dry in remote areas
- Comparing two vehicles at a dealership to see which offers more range per full tank
- Deciding whether a single tank is enough for a round-trip before renting a car
- Estimating total fuel cost for a trip by combining range with current gas prices per liter
Example Calculation
- 50L × 15 km/L
- 750 km
How it works
3 min readHow It's Calculated
The formula is straightforward:
Range = Tank Capacity (L) × Fuel Economy (km/L)Or in US customary units:
Range (miles) = Tank Capacity (gal) × Fuel Economy (MPG)If your fuel economy is given in L/100 km (common in Europe and Canada), convert first:
km/L = 100 ÷ (L/100 km)
Range = Tank Capacity (L) × (100 ÷ L/100km)For MPG ↔ km/L conversion: 1 MPG (US) = 0.4251 km/L (NIST unit equivalence).
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Reference Table
Real-world ranges for common vehicle types, based on EPA-reported fuel economy averages (model year 2024):
| Vehicle Type | Typical Tank (L / gal) | EPA Combined (km/L / MPG) | Estimated Range |
|---|---|---|---|
| Compact sedan (e.g., Toyota Corolla) | 50 L / 13.2 gal | 14.9 km/L / 35 MPG | ~745 km / 462 mi |
| Midsize SUV (e.g., Honda CR-V) | 57 L / 15.1 gal | 12.3 km/L / 29 MPG | ~701 km / 438 mi |
| Full-size pickup (e.g., Ford F-150 2.7T) | 98 L / 26 gal | 10.2 km/L / 24 MPG | ~1,000 km / 624 mi |
| Hybrid sedan (e.g., Toyota Prius) | 43 L / 11.3 gal | 21.3 km/L / 50 MPG | ~916 km / 565 mi |
| Economy hatchback (e.g., Honda Fit) | 40 L / 10.6 gal | 15.7 km/L / 37 MPG | ~628 km / 392 mi |
| Minivan (e.g., Toyota Sienna Hybrid) | 70 L / 18.5 gal | 14.5 km/L / 34 MPG | ~1,015 km / 629 mi |
| Sports car (e.g., Ford Mustang GT) | 61 L / 16 gal | 10.6 km/L / 25 MPG | ~646 km / 400 mi |
> Sources: EPA Fuel Economy Guide 2024 (fueleconomy.gov).
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Typical Use Cases with Numbers
Example 1 — Road Trip Planning
You're driving from Los Angeles to Las Vegas (~435 km / 270 mi). Your midsize SUV has a 57 L tank and gets 12.3 km/L.
Range = 57 × 12.3 = 701 km701 km > 435 km, so you can make the round trip (870 km) only if you refuel in Las Vegas. The calculator instantly flags that one fill-up is not enough for the full round trip.
Example 2 — Comparing Rentals
Option A: Compact with 40 L tank, 15 km/L → Range = 600 km
Option B: SUV with 70 L tank, 11 km/L → Range = 770 km
Even though Option B uses more fuel per km, its larger tank means 28% more range between stops — critical if you're crossing regions with sparse gas stations.
Example 3 — US Gallons / MPG
A pickup truck: 26-gallon tank, 22 MPG highway.
Range = 26 gal × 22 MPG = 572 milesAt 60 mph, that's over 9.5 hours of driving before needing gas.
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Common Mistakes
1. Using city MPG instead of highway MPG (or combined): City fuel economy can be 20–30% lower than highway. For a mixed route, always use the EPA combined rating. Using highway-only figures inflates your estimate and may leave you stranded.
2. Forgetting the fuel reserve: Most vehicles have a low-fuel warning light that triggers with roughly 10–15% of tank capacity remaining (~5–8 L on a 50 L tank). Your practical range is about 85–90% of the calculated maximum.
3. Confusing L/100 km with km/L: A car rated at 8 L/100 km gets 12.5 km/L — not 8. Plugging 8 directly into the range formula gives a wildly incorrect result. Always convert: km/L = 100 ÷ (L/100 km).
4. Ignoring load, terrain, and A/C: EPA estimates assume standard conditions. Roof racks, heavy cargo, mountain grades, or running the air conditioner in summer can reduce real-world fuel economy by 10–25%, per DOE data. Apply a realistic correction factor for long hauls.
5. Mixing unit systems: Using gallons for capacity but km/L for economy (or vice versa) without converting produces nonsense. Always ensure both inputs share a consistent unit system before calculating.
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Related Calculators
Since there are no related slugs configured for this calculator, explore other tools on Hacé Cuentas to complement your road trip math — such as fuel cost estimators, unit converters, and trip planners.
Frequently asked questions
What is the formula for calculating fuel tank range?
The formula is: Range = Tank Capacity × Fuel Economy. In metric: Range (km) = Capacity (L) × Economy (km/L). In US units: Range (miles) = Capacity (gallons) × Economy (MPG). For example, a 13-gallon tank at 30 MPG gives 390 miles of range.
How do I convert L/100 km to km/L for this calculator?
Divide 100 by your L/100 km figure. If your car is rated 7.5 L/100 km, then km/L = 100 ÷ 7.5 = 13.33 km/L. This is the value you should enter as fuel economy. Entering 7.5 directly would drastically understate your range.
Should I use city, highway, or combined MPG for the most accurate result?
Use the EPA combined rating for general estimates — it blends 55% city and 45% highway driving. For pure highway trips, the highway figure is more accurate. For urban commutes, use the city rating. The EPA publishes all three for every vehicle model year at fueleconomy.gov.
What is a realistic practical range vs. the calculated maximum?
Most drivers should subtract 10–15% from the calculated range to account for the fuel reserve (the low-fuel warning activates at roughly 10–15% remaining capacity). Additional real-world factors like cargo load, A/C use, headwinds, and altitude can reduce efficiency by another 5–20%, per U.S. Department of Energy estimates.
How does a full-size pickup's range compare to a hybrid sedan?
A Ford F-150 with a 98 L (26-gal) tank at ~22 MPG highway covers roughly 572 miles (920 km). A Toyota Prius with a 43 L (11.3-gal) tank at ~50 MPG highway covers about 565 miles (910 km). The pickup's larger tank nearly compensates for its lower efficiency — illustrating that range depends on both tank size and economy.
How many miles per gallon does the average new car get in the US?
According to the EPA's 2024 Fuel Economy Trends Report, the average fuel economy of new model year 2023 vehicles sold in the US was approximately 26.4 MPG (combined city/highway). This is a record high, up from ~20 MPG in 2004, driven by hybrid and more efficient ICE technology.
Does outside temperature affect how far I can drive on a full tank?
Yes, significantly. The U.S. Department of Energy notes that cold weather (20°F / -7°C) can reduce conventional vehicle fuel economy by 15–24% compared to 77°F / 25°C conditions, mainly due to engine warm-up time, denser air, and increased accessory loads. At 20°F, a vehicle normally rated 30 MPG may realistically achieve only ~23–25 MPG.
How do I calculate range for an electric vehicle (EV) using this tool?
This calculator is designed for liquid-fuel vehicles. For EVs, the equivalent formula is: Range = Battery Capacity (kWh) × Efficiency (miles/kWh or km/kWh). The EPA rates EVs in MPGe (miles-per-gallon equivalent); for example, a Tesla Model 3 Long Range is rated ~358 miles of EPA range on a ~82 kWh usable battery, roughly 4.4 miles/kWh.