Distance from San Antonio, TX to Round Rock, TX
Driving directions and distance from San Antonio, TX to Round Rock, TX. See miles, drive time, and estimated gas cost for the trip.
Trip cost calculator
Trip details
| From | San Antonio, Texas (population: 1,409,019) |
|---|---|
| To | Round Rock, Texas (population: 109,821) |
| Driving distance | 112 miles |
| Straight-line (as the crow flies) | 89 miles |
| Estimated drive time | 1 hr 52 min (avg 60 mph) |
| Gas needed at 25 MPG | ~ 4.5 gallons |
| Gas needed at 30 MPG | ~ 3.7 gallons |
| San Antonio coordinates | 29.4241°, -98.4936° |
| Round Rock coordinates | 30.5083°, -97.6789° |
Frequently asked questions
How many miles is it from San Antonio, TX to Round Rock, TX?
The driving distance from San Antonio, TX to Round Rock, TX is approximately 112 miles by road. As the crow flies (straight line), the two cities are 89 miles apart.
How long is the drive from San Antonio, TX to Round Rock, TX?
The drive takes about 1 hr 52 min at an average speed of 60 mph. Actual time will depend on traffic, weather, your driving speed, and how often you stop. Plan for additional time on routes with construction, urban congestion, or scenic detours.
How much will gas cost?
For a vehicle averaging 25 MPG, expect to use about 4.5 gallons — roughly $15 at $3.40/gallon. A more efficient vehicle (30 MPG) would use about 3.7 gallons, or $13. Use the calculator above to plug in your own MPG and local gas price.
What's the best route?
The figures above show the most direct driving route. For real-time turn-by-turn directions, current traffic conditions, and to compare alternative routes (interstate vs. scenic), use Google Maps or your preferred GPS app. Toll roads may shave time but add cost — check ahead for E-ZPass / SunPass / FasTrak coverage.