Travel · official-source review · reviewed 2026-10-09
Fuel budgets miss one way: the car's highway number and the trip's actual miles are never multiplied together on paper.
Compute gallons, fuel cost, and a contingency from miles, MPG, and your local price per gallon.
Anyone planning a multi-stop road trip by car.
Use the source document or official route that applies to your situation. This guide does not contact another person or verify external information.
Use your own highway MPG, not the window sticker alone.
Count the round-trip miles from your route plan.
Sample current regular unleaded prices along the route.
Add a contingency for detours and idling.
900 miles at 30 MPG and $3.45 per gallon budgets about $103.50 plus a 10 percent contingency.
Use your own source and details. The example is not a record about a real person or organization.
U.S. Department of Energy and U.S. Environmental Protection Agency, FuelEconomy.gov · reviewed 2026-10-09
What this source supports: FuelEconomy.gov publishes official MPG estimates and real-world guidance for comparing vehicles.
Source limit: Your own mileage varies with driving style, load, and conditions. Budget from your real-world number.
These sources support the statements above. They do not show that every person needs this guide. They do not show a specific result.
This guide multiplies the numbers you enter. It does not plan routes, track live gas prices, or account for towing or weather detours.
Your own mileage varies with driving style, load, and conditions. Budget from your real-world number.
Use current instructions from the responsible organization. This guide is a planning aid, not an official decision or a substitute for qualified advice.
Compute gallons and fuel cost from trip miles, MPG, and price, then add a written contingency.
This App multiplies numbers you enter. It does not fetch gas prices, plan routes, or adjust for towing and weather.
You enter every number yourself. The sources support the method and the limits. They do not produce a result for your specific case. Keep the original documents next to the sheet you build.
The App computes the worked example with your own numbers, in your browser.
APP 1
Compute gallons and fuel cost from trip miles, MPG, and price, then add a written contingency.
Free · no account · no upload
Open Road Trip Fuel BudgetThe App runs in this browser. It does not send or save entries. Copy, download, or print only when you choose.
This guide uses short, direct instructions as an ASD-STE100-style writing target. It is not a formal certification.
Companion App: Road Trip Fuel Budget. It runs in this browser and does not upload your entries.
This guide is edited for clarity and checked against the sources it links. It is not a substitute for official instructions or qualified advice. A linked source does not show that every person needs this guide.