Fuel cost calculator · About 135 miles
Gas cost from Philadelphia to Washington, D.C.
The drive from Philadelphia, PA to Washington, D.C. is about 135 miles, so a round trip costs about $38.77 in gas at this week's average of $4.31 a gallon. Change the car, fuel or distance below for your own figure.
What the trip costs by vehicle
| Vehicle | One way | Round trip |
|---|---|---|
| Compact car (33 mpg) | $17.62 | $35.25 |
| Midsize sedan (30 mpg) | $19.39 | $38.77 |
| Hybrid (50 mpg) | $11.63 | $23.26 |
| Minivan (22 mpg) | $26.44 | $52.87 |
| SUV (24 mpg) | $24.23 | $48.47 |
| Pickup truck (19 mpg) | $30.61 | $61.22 |
Regular gas at $4.308 a gallon, the average of this week's Pennsylvania and Washington, D.C. prices, from the EIA’s weekly survey. Fuel only: tolls and parking are not included.
Fuel economy figures are round examples for each kind of vehicle, not official ratings. Your own car's EPA rating is on fueleconomy.gov.
Distance: fastest route between city centres, rounded to the nearest 5 miles, calculated with OSRM on OpenStreetMap road data (© OpenStreetMap contributors), measured November 2026.
135 miles in Pennsylvania
$19.40
4.5 gallons at $4.31 a gallon
$0.71 more than the same trip at the national average.
- Per mile
- 14.4¢
- A full tank
- $64.65
- about 450 miles
- A year of driving
- $1,724
- $144 a month
Where to fill up
Regular is about $0.23 a gallon cheaper in Washington, D.C. than in Pennsylvania this week, $3.45 on a 15-gallon fill. Fill the tank on the Washington, D.C. side of the trip. See how Washington, D.C.’s gas tax compares.
Philadelphia to Washington, D.C. by car
- How much does gas cost from Philadelphia to Washington, D.C.?
- About $19.39 one way, or $38.77 for the round trip, in a car that gets 30 mpg. That assumes 135 miles and this week's average regular price of $4.31 a gallon. An SUV at 24 mpg spends about $24.23 one way; a hybrid at 50 mpg about $11.63.
- How far is Philadelphia from Washington, D.C. by car?
- About 135 miles on the fastest route between the two city centres, measured on OpenStreetMap road data. Your own start and end points may make it a little longer or shorter; type your distance into the calculator for an exact figure.
- How many gallons of gas does the drive take?
- About 4.5 gallons one way at 30 mpg. That fits in a typical 15-gallon tank, so most cars can make it without stopping for fuel.
- Is gas cheaper in Pennsylvania or Washington, D.C.?
- This week regular is about $0.23 a gallon cheaper in Washington, D.C., which is $3.45 on a 15-gallon fill. About 23¢ of that gap is state fuel tax. Filling up before you leave Washington, D.C. saves the most.