RV Tools · Fuel Calculator
Road Trip Fuel Cost
RV Fuel Cost Calculator
How are you planning?
Trip details
Needed to estimate number of fuel stops.
Nashville, TN
Great Smoky Mountains, TN
Est. fuel cost
$90.93
Road miles
187 mi
Gallons needed
23.4 gal
Cost per mile
$0.486
Based on 8 MPG · $3.89/gal · 100-gal tank · 20% reserve. Enter your own numbers to get a personalized estimate.
We use this
GasBuddy
GasBuddy shows real-time prices at stations along your route — so you can stop at the cheapest pump, not just the nearest one.
Tire safety
TireMinder i10 TPMS
Proper tire inflation is one factor in fuel efficiency. The TireMinder i10 comes with six transmitters and monitors pressure and temperature in real time — helping you spot tire problems before they become roadside emergencies.
See our gear picksRV Trip Planner
Build your full itinerary — campsites, gear, and daily schedule
How the RV Fuel Planner Works
Step 1
Enter your route
We calculate actual road mileage using a routing service — not straight-line distance. Your RV drives roads, not crow-flies.
Step 2
Tell us about your RV
Your MPG, physical tank capacity, starting fuel level, and desired reserve determine your usable range between stops.
Step 3
Plan your fuel stops
We calculate comfortable fuel windows before your reserve kicks in, show nearby station candidates, and estimate trip cost using regional EIA fuel-price data.
Trip Planning Tips
Fuel-Saving Tips for RV Travelers
Small habits add up over a long trip. Here's what actually moves the needle on fuel costs.
Watch your speed
Fuel economy drops significantly above 60 mph in most RVs. Slowing down from 70 to 60 can improve MPG by 10–15% — a meaningful saving over hundreds of miles.
Keep tires properly inflated
Underinflated tires increase rolling resistance and fuel consumption. Check your tire pressure before every trip — it's one of the easiest ways to support fuel economy.
Reduce unnecessary weight
Every 100 lbs of extra weight costs you fuel. Audit your storage before a long trip — water tanks, tools, and gear you won't use are all dead weight.
Minimize idling
An idling RV engine burns fuel without moving you anywhere. Use shore power or a generator for climate control at camp instead of running the engine.
Plan your route for terrain
Mountain grades and headwinds can cut your MPG dramatically. When possible, route through flatter terrain or plan fuel stops before major climbs.
Compare prices before you stop
Fuel prices vary by 30–50 cents per gallon within a few miles of major highways. Checking prices in advance — not just stopping at the first exit — can save real money on a long trip.
Gear We Use
Road-Trip Ready Gear
Products we've tested and use on our own trips. Affiliate links help support Route Unwritten at no extra cost to you.
Route Unwritten participates in the Amazon Services LLC Associates Program and other affiliate programs. We earn a small commission on qualifying purchases at no additional cost to you. We only recommend products we've personally used and tested.
Frequently Asked Questions
About this RV fuel planner
RV fuel costs are one of the biggest variables in any road trip budget. Unlike a car, a Class A motorhome or fifth wheel tow vehicle might average 6–10 MPG, making fuel a major line item on any trip.
This RV trip fuel planner helps you estimate total fuel cost, how many gallons you'll use, your cost per mile, and how many times you'll need to stop — all based on your rig's actual MPG and tank capacity. Use Plan My Fuel Stops to look up your exact driving distance automatically and calculate precise fuel windows along the way.
Save your rig profile in My Rig to automatically prefill your MPG, tank capacity, and fuel type every time you use this tool. For a full day-by-day itinerary with pacing and arrival times, use the RV Trip Planner. To calculate how many travel days your trip will take based on your driving pace, use the RV Travel Time Calculator.
Packing for this trip?
See the gear we actually use on every RV trip — curated from real miles on the road.
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