Distance between cities › USA › Texas › Katy, TX › Distance from Katy to Karnack Book Hotels

Distance from Katy, TX to Karnack, TX

Distance

261 mi

Time

4 hours 59 mins

Gas Cost

$24 - $47

There are 221.81 miles from Katy to Karnack in northeast direction and 261 miles (420.04 kilometers) by car, following the TX 99 Toll route.

Katy and Karnack are 4 hours 59 mins far apart, if you drive non-stop .

This is the fastest route from Katy, TX to Karnack, TX. The halfway point is Diboll, TX.

Katy, TX and Karnack, TX are in the same time zone (CDT). Current time in both locations is 9:56 pm.

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Lowest Price Rental Cars in Katy, TX

Planning on renting a car to go from Katy, TX to Karnack, TX? Here there are some offers to rent a car in Katy, TX

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Katy »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 10.49 gallons of gas to cover the route between Katy, TX and Karnack, TX.

The estimated cost of gas to go from Katy to Karnack is $33.62.

During the route, an average car will release 205.48 pounds of CO₂ to the atmosphere. The carbon footprint would be 0.79 pounds of CO₂ per mile.

Average USA gas price used for calculation is $3.21 per gallon of regular gas. Price last updated on March 11, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Katy, TX and Karnack, TX

If you want to meet halfway between Katy, TX and Karnack, TX or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 31.140211 and -94.807800, or 31º 8' 24.7596" N, 94º 48' 28.08" W. This location is 130.57 miles away from Katy, TX and Karnack, TX and it would take approximately 2 hours 29 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Diboll, TX, situated 135 miles from Katy, TX and 129 miles from Karnack, TX. It would take 2 hours 29 mins to go from Katy to Diboll and 2 hours 34 mins to go from Karnack to Diboll.