Estimate moving truck fuel using total route miles, realistic mpg scenarios and a user-entered fuel price, with detours and return fuel kept clear.
Build a distance that matches the truck's job
Include the rental pickup leg, old and new addresses, planned stops and the return location. For repeated local trips, count both loaded and empty legs. Keep a known route detour in the mileage total; add a separate percentage allowance only for uncertainty that is not already represented.
Fuel gallons equal route mi divided by mpg. Fuel cost equals gallons multiplied by the price per gal. The mpg input must be positive; zero mpg cannot produce a meaningful estimate. A zero-mile route produces zero driving fuel in this simple model, but it does not erase rental fees or other move costs.
| Hypothetical mpg scenario | Distance with allowance | Gallons | Cost at $4 per gal |
|---|---|---|---|
| 12 mpg | 330 mi | 27.5 gal | $110 |
| 10 mpg | 330 mi | 33 gal | $132 |
| 8 mpg | 330 mi | 41.25 gal | $165 |
The example starts with 300 mi and adds 10%, producing 330 mi. The 8, 10 and 12 mpg values are sensitivity inputs, not claims about your vehicle's performance. U-Haul describes its published truck mpg as an estimate for ideal circumstances and notes that conditions, including load, affect it.
Keep assumptions visible
Use a quoted or observed fuel price and date it. On a long trip, one station price may not represent every purchase, so run a higher-price scenario rather than pretending to know the route's future average. Keep the tank size separate from consumption; tank capacity is not the amount of fuel your journey necessarily uses.
If you add 30 mi of known detours to the 300 mi route, you already have 330 mi. Applying another 10% solely to cover the same detours would count them twice. Label each allowance with its purpose and remove it when the route becomes known.
Reconcile fuel purchases and return conditions
Photograph the starting fuel level and read the agreement's return requirement. Fuel bought during the trip and fuel consumed may differ when the starting and ending tank levels differ. A refueling service charge is another expense, not improved or worsened mpg.
Retain fuel receipts with gallons, USD and odometer readings when practical. After the move, compare actual purchases with the planning range without concluding that one partial-tank purchase proves the truck's fuel economy. Use the rental invoice to identify any separate fuel charge before closing the budget. This model excludes prolonged idling and any fuel-powered equipment outside the truck's driving consumption.
Reviewed October 22, 2026. Workflows, quantities and USD examples are editorial planning scenarios, not market averages or a carrier quote. Confirm the terms for your move.
- U-Haul — 15 ft truck specifications — Published approximate volume 764 cu ft, door 7 ft 3 in by 6 ft 5 in and maximum load 6,385 lb; assigned equipment may differ. (Checked 2026-10-22.)
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