Distance between cities › Australia › Victoria › Colac, VIC › Distance from Colac to Williamstown Book Hotels

Distance from Colac, VIC to Williamstown, SA

Distance

675 km

Time

8 hours 41 mins

Gas Cost

$51 - $132

There are 585.32 km (363.70 miles) from Colac to Williamstown in northwest direction and 675.92 km (420 miles) by car, following the A66 route.

Colac and Williamstown are 8 hours 41 mins far apart, if you drive non-stop .

This is the fastest route from Colac, VIC to Williamstown, SA.

Please note the time difference between Colac, VIC and Williamstown, SA is 30 minutes. The current time in Colac is 6:30 pm and the current time in Williamstown is 6:00 pm.

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Lowest Price Rental Cars in Colac, VIC

Planning on renting a car to go from Colac, VIC to Williamstown, SA? Here there are some offers to rent a car in Colac, VIC

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Colac »

Gas Consumption and Emissions

A car with a fuel efficiency of 10.8 l/100 km will need 72.93 liters of fuel to cover the route between Colac, VIC and Williamstown, SA.

The estimated cost of fuel to go from Colac to Williamstown is $109.40.

During the route, an average car will release 1,744.55 kilograms of CO₂ to the atmosphere. The carbon footprint would be 2.58 kilograms of CO₂ per kilometer.

Average Australia gas price used for calculation is $1.50 per liter of regular gas. Price last updated on March 13, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Colac, VIC and Williamstown, SA

If you want to meet halfway between Colac, VIC and Williamstown, SA or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are -36.815731 and 141.011627, or 36º 48' 56.6316" S, 141º 0' 41.8572" E. This location is 209.81 miles away from Colac, VIC and Williamstown, SA and it would take approximately 4 hours 20 mins to reach the halfway point from both locations.

Distance conversions

Checkout the distance in miles, kilometers and nautical miles between Colac, VIC and Williamstown, SA in this table:

Distance type	Miles	Kilometers	Nautical miles
Straight line distance	363.70 mi	585.32 km	316.05 nautical mi
Driving distance	420 mi	675.30 km	364.64 nautical mi

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