Texas

Distance from Houston to Round Rock

Straight-line distance

145.2mi

Houston, TX and Round Rock, TX are 145.2 miles (233.7 km) apart in a straight line. From Houston, the shortest path starts out heading WNW (291°).

kilometers
233.7
nautical miles
126.2
heading from Houston
291° WNW
heading from Round Rock
110° ESE
HoustonRound Rock

Orange line: great-circle path · ring: midpoint · thin lines: county borders

How far Houston is from Round Rock

The great-circle distance between the Census internal points of Houston and Round Rock is 145.2 miles, 233.7 km or 126.2 nautical miles. That is the shortest path over the Earth's surface, computed with the haversine formula on a sphere with the mean Earth radius, 6,371.0 km. A course held on one compass bearing (a rhumb line) would be 145.2 miles, practically the same at this range.

Measurements

Miles
145.2
Kilometers
233.7
Nautical miles
126.2
Bearing from Houston
291.2° WNW
Bearing arriving at Round Rock
290.1°
Bearing from Round Rock
110.1° ESE

Halfway between Houston and Round Rock

The great-circle midpoint is at 30.160804, -96.521880 (30°09'38.89"N 96°31'18.77"W). The nearest incorporated place of 1,000 or more people is Brenham, TX, with 19,728 residents, 7.5 miles from the midpoint. To find towns near the midpoint of any two places, use the halfway tool.

Time zones and daylight

Both use America/Chicago, so there is no time difference. On June 21, Houston gets 14 h 04 min of daylight and Round Rock 14 h 07 min; on December 21, 10 h 14 min and 10 h 10 min. Round Rock is 0.74° farther north, so it has the longer summer days and the shorter winter ones.

Population compared

Houston has 17.7 times the population of Round Rock. From July 2020 to July 2024, Houston changed by +4.0% and Round Rock by +12.3%. Both are in Texas.

  1. 01Houston, TX2,390,125 (+4.0%)
  2. 02Round Rock, TX135,359 (+12.3%)
July 1, 2024 population and change since July 2020, Census Vintage 2024.

Questions people ask

How far is Houston from Round Rock?

145.2 miles, 233.7 km or 126.2 nautical miles along the great circle between the two Census internal points. Road distance is longer.

Which direction is Round Rock from Houston?

WNW. The great-circle path leaves Houston on a bearing of 291.2° and arrives at Round Rock on 290.1°. The return trip starts on 110.1°.

What is halfway between Houston and Round Rock?

The midpoint is at 30.160804, -96.521880. The nearest incorporated place of 1,000+ is Brenham, TX, 7.5 miles from it.

Is there a time difference between Houston and Round Rock?

Both use America/Chicago, so there is no time difference.

Which is bigger, Houston or Round Rock?

Houston, with 2,390,125 residents in July 2024 against 135,359 for Round Rock, 17.7 times as many.

Sources and data as of

Data as of: Census 2024 Gazetteer internal points and Vintage 2024 estimates; time zones from Open-Meteo.

  1. 01Census 2024 Gazetteer, places
  2. 02Census Vintage 2024 subcounty population estimates
  3. 03SunCalc library (Vladimir Agafonkin), algorithms after Jean Meeus
  4. 04IANA time zone database (clock times and daylight saving rules)

How every number is computed: methodology. Spotted a wrong figure? Report an error.