Miles Per Tank Calculator
Wondering how far you can go before the next gas stop? Enter your tank size and MPG for the range on a full tank, plus what a fill-up runs at today's prices.
How far one tank takes you
Tank size times your MPG is your range on a full tank. Toss in the pump price and you'll also see what it costs to fill up from empty.
Range per tank
420 mi
On a full tank, at this MPG
Cost to fill up
$49.00
From empty to full
Fuel cost per mile
$0.12
Just the gas, nothing else
From gallons to a day's drive
Range is one of the friendlier bits of car math: multiply your tank's gallons by your MPG and you've got the miles a full fill covers. A 14-gallon tank at 30 MPG is good for about 420 miles between stops.
Add the pump price and you get the other half — what it costs to fill from empty. Those same 14 gallons at $3.50 come to $49, and dividing the fill cost by the range gives you the pure fuel cost per mile, right around 12 cents here.
It's the quick check before a long haul. Know your range and you know roughly how many stops a trip needs and what each fill will set you back.
Frequently asked questions
How is range per tank figured out?
Tank size times MPG. A 14-gallon tank at 30 MPG gives you about 420 miles on a full fill. It's the theoretical max, so real range runs a little shorter once you factor in the reserve most people leave at the bottom.
Where do I find my tank size?
The owner's manual lists it, usually as fuel tank capacity in gallons. If you can't find it, note how many gallons the pump takes when you fill from nearly empty a couple of times — it'll be close.
Should I trust the full-tank range?
Treat it as a ceiling, not a promise. Cars keep a reserve, and most drivers refuel with a couple gallons left. Knock 10 to 15% off the number if you want a safer real-world range to plan a trip around.
Why does the fill-up cost matter?
It's the sticker shock in advance. Fourteen gallons at $3.50 is about $49, and seeing that before you pull in helps you budget road trips or notice when a bigger tank quietly costs more to top off.
Does highway or city driving change this?
It changes your MPG, which changes everything downstream. Enter your highway MPG for a road-trip range and your city MPG for daily commuting. The tank size stays the same, but the miles it buys you don't.
How can I stretch each tank further?
Smooth, steady driving does most of the work — easy on the accelerator, coasting to stops, and keeping tires properly inflated. Dropping extra weight and roof racks helps too, since anything that lifts MPG stretches the miles per tank.