Fuel & Efficiency Calculator
Fuel Tank Range Calculator
Planning a long stretch between gas stations? See how far a full tank takes you — and how many miles are left in the tank you have right now.
Your Vehicle
Fuel you'd rather not run below. Subtracted from usable range.
Range on Current Fuel
on 7.5 gal in the tank
Full-Tank Range
450 mi
Usable to Reserve
195 mi
Gallons to Fill
7.5 gal
Miles per Gallon Left
30 mi
Real-world note
Highway cruising can beat this range; city traffic, cold weather, and towing cut it. Keep a 30-mile buffer as insurance.
How it works.
Frequently asked questions.
How accurate is the fuel gauge for this?
Fuel gauges are approximate and often non-linear — the needle drops slowly at first, then faster near empty. Use the slider as an estimate and keep a safety buffer, especially below a quarter tank.
How far can I drive after the low-fuel light comes on?
Most cars have a reserve of roughly 1–3 gallons when the light appears, which is often 30–60 miles depending on MPG. It varies by model, so don't rely on it — treat the light as "fill up soon," not "keep going."
Why is my real range lower than this estimate?
The formula uses your entered MPG. City driving, cold starts, aggressive acceleration, roof racks, heavy loads, and towing all lower actual MPG, which shortens range. Use your real-world combined MPG for the best estimate.