Fuel Stop Timing Calculator

Decide whether to fill up now or buy only enough fuel to reach cheaper gas after reserve range, detour fuel, time, tolls and tank capacity.

Transparent browser-side model · Inputs stay on this device

INPUT→MODEL→CONSTRAINT→DECISION

Tank capacity (gal)Gallons currently in tankVehicle MPGMiles to cheaper stationCurrent gas price / gal ($)Cheaper station price / gal ($)Desired reserve range (miles)Extra detour milesExtra detour time (minutes)Value of time / hour ($)Tolls / extra fees ($)

Enter your assumptions, then compare the options.

USE THE RESULT AS A DECISION BOUNDARY

Try a conservative set of assumptions before acting. If a small change flips the recommendation, compare both outcomes rather than treating the result as certain.