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

Distance from St Clair, VIC to Williamstown, SA

Distance

863 km

Time

11 hours 12 mins

Gas Cost

$65 - $168

There are 743.57 km (462.03 miles) from St Clair to Williamstown in northwest direction and 862.61 km (536 miles) by car, following the A8 route.

St Clair and Williamstown are 11 hours 12 mins far apart, if you drive non-stop .

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

Please note the time difference between St Clair, VIC and Williamstown, SA is 30 minutes. The current time in St Clair is 12:42 am and the current time in Williamstown is 12:12 am.

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Lowest Price Rental Cars in St Clair, VIC

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in St Clair »

Gas Consumption and Emissions

A car with a fuel efficiency of 10.8 l/100 km will need 93.22 liters of fuel to cover the route between St Clair, VIC and Williamstown, SA.

The estimated cost of fuel to go from St Clair to Williamstown is $139.83.

During the route, an average car will release 2,229.81 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 6, 2026.
Read more about our CO₂ calculation.

Halfway Point Between St Clair, VIC and Williamstown, SA

If you want to meet halfway between St Clair, 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 -36.773411 and 142.279053, or 36º 46' 24.2796" S, 142º 16' 44.5908" E. This location is 268.17 miles away from St Clair, VIC and Williamstown, SA and it would take approximately 5 hours 36 mins to reach the halfway point from both locations.

Distance conversions

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

Distance type	Miles	Kilometers	Nautical miles
Straight line distance	462.03 mi	743.57 km	401.50 nautical mi
Driving distance	536 mi	863.14 km	466.06 nautical mi

Road Trip Tips