Fuel cost calculator · About 90 miles
Gas cost from Chicago to Milwaukee
The drive from Chicago, IL to Milwaukee, WI is about 90 miles, so a round trip costs about $25.60 in gas at this week's average of $4.27 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) | $11.64 | $23.27 |
| Midsize sedan (30 mpg) | $12.80 | $25.60 |
| Hybrid (50 mpg) | $7.68 | $15.36 |
| Minivan (22 mpg) | $17.45 | $34.91 |
| SUV (24 mpg) | $16.00 | $32.00 |
| Pickup truck (19 mpg) | $20.21 | $40.42 |
Regular gas at $4.266 a gallon, the average of this week's Illinois and Wisconsin 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.
90 miles in Illinois
$12.81
3 gallons at $4.27 a gallon
$0.35 more than the same trip at the national average.
- Per mile
- 14.2¢
- A full tank
- $64.05
- about 450 miles
- A year of driving
- $1,708
- $142 a month
Where to fill up
Regular is about $0.39 a gallon cheaper in Wisconsin than in Illinois this week, $5.82 on a 15-gallon fill. Fill the tank on the Wisconsin side of the trip. See how Wisconsin’s gas tax compares.
Chicago to Milwaukee by car
- How much does gas cost from Chicago to Milwaukee?
- About $12.80 one way, or $25.60 for the round trip, in a car that gets 30 mpg. That assumes 90 miles and this week's average regular price of $4.27 a gallon. An SUV at 24 mpg spends about $16.00 one way; a hybrid at 50 mpg about $7.68.
- How far is Chicago from Milwaukee by car?
- About 90 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 3.0 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 Illinois or Wisconsin?
- This week regular is about $0.39 a gallon cheaper in Wisconsin, which is $5.82 on a 15-gallon fill. About 39¢ of that gap is state fuel tax. Filling up before you leave Wisconsin saves the most.