How far is Union, NJ from Mercerville, NJ?
The driving distance from Union, NJ to Mercerville, NJ is about 43.7 miles (70.4 km), with a travel time of about 01h 04m by car.
- The straight-line flight distance is about 38.8 miles (62.5 km).
- For a round trip, plan for roughly 02h 09m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM EST.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 01h 04m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Borough in Middlesex County, New Jersey
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Partly Cloudy
Driving Route Map
The map below follows the saved road route between Union and Mercerville.
Turn-by-Turn Driving Directions
Step-by-step road directions between Union and Mercerville.
-
1
Start on Harding Avenue
74 m · 12 sec · Harding Avenue
-
2
Turn right onto Vauxhall Road
1087 ft · 42 sec · Vauxhall Road
-
3
Turn left onto Stuyvesant Avenue
3120 ft · 2 min · Stuyvesant Avenue
-
4
Continue on Chestnut Street
708 ft · 28 sec · Chestnut Street
-
5
Take the ramp slight right toward GSP Toll South
1588 ft · 39 sec
-
6
Merge slight left onto Garden State Parkway
8.6 mi · 12 min · Garden State Parkway
-
7
Continue on Garden State Parkway Southbound
1.3 mi · 2 min · Garden State Parkway Southbound
-
8
Take the exit slight right toward US 1: Newark, Trenton
1110 ft · 27 sec
-
9
Keep slight right to continue on US 1 South: Trenton
1453 ft · 35 sec
-
10
Merge slight left
636 ft · 13 sec
-
11
Continue straight
2.1 mi · 3 min
-
12
Continue straight
7.4 mi · 11 min
-
13
Continue straight
634 ft · 10 sec
-
14
Keep slight left
84 m · 4 sec
-
15
Keep slight left
118 m · 6 sec
-
16
Keep slight left
3.6 mi · 5 min
-
17
Continue straight
13.9 mi · 20 min
-
18
Take the exit slight right
975 ft · 15 sec
-
19
Keep slight right to continue on I 295 South: Camden
1573 ft · 1 min
-
20
Merge slight left
1.9 mi · 2 min
-
21
Take the exit slight right toward Sloan Avenue
1116 ft · 15 sec
-
22
Keep slight left
1189 ft · 16 sec
-
23
Keep slight left
1645 ft · 22 sec
-
24
Merge slight left
1652 ft · 22 sec
-
25
Take the exit slight right toward CR 535 North: Mercerville
1768 ft · 23 sec
-
26
Turn straight onto East State Street
1.2 km · 1 min · East State Street
-
27
At the end of the road, turn left onto Nottingham Way
669 ft · 18 sec · Nottingham Way
-
28
Continue on Edinburg Road
140 m · 11 sec · Edinburg Road
-
29
Arrive at your destination
0 m · 1 sec · Edinburg Road
Car Route Details
A richer read on the saved driving route between Union and Mercerville.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
US 1 South
Continue straight
13.9 mi · 00h 20m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Sunny leaving Union and Partly Cloudy near Mercerville.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Union to Mercerville?
The road trip is about 43.7 miles (70.4 km) and usually takes 01h 04m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Milltown is a useful midpoint, sitting about 21.9 miles from Union and 21.9 miles from Mercerville.
How much longer is the road route than the straight-line distance?
The direct path is about 38.8 miles (62.5 km), while the road route adds roughly 4.9 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 8:00 AM to 10:00 AM EST. If you want a more comfortable same-day return, try to leave by 4:20 PM EST.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $6.26 one way or $12.51 round trip. Estimated CO2 is about 13.7 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Union and Partly Cloudy near Mercerville.
Stop Ideas Near Milltown
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Milltown.
New Brunswick station
Metropark station
Princeton Junction station
Newark Liberty International Airport
Flight Path Map
This map shows the direct air route between Union and Mercerville. Straight-line distance: 38.83 mi (62.49 km).
#1 Union
A city in Union County, New Jersey.
| Population | 67,137 |
| Coordinates | 40.6976000, -74.2632000 |
| Altitude | 30 |
| Country | United States |
#2 Mercerville
Mercerville is a place in New Jersey, United States.
| Population | 0 |
| Coordinates | 40.2370500, -74.6865500 |
| Altitude | 27 |
| Country | United States |
End: Mercerville (-74.68655, 40.23705)
Estimated Travel Time
Distance: 70 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 27m |
| 40 mph (64.37 km/h) | 01h 05m |
| 50 mph (80.47 km/h) | 00h 52m |
| 60 mph (96.56 km/h) | 00h 43m |
| 70 mph (112.65 km/h) | 00h 37m |
| 80 mph (129 km/h) | 00h 32m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.06 | $6.26 | $12.51 |
| Mid-grade | $4.69 | $7.23 | $14.45 |
| Premium | $5.01 | $7.71 | $15.43 |
| Diesel | $6.30 | $9.71 | $19.41 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in New Jersey · Nov 08, 2026