A Keilor woman has been charged over a horrific fatal crash involving a petrol tanker on the Calder Freeway.

One person was killed and six others injured when the woman's car allegedly pulled out in front of the truck, causing it to swerve.

The scene of the crash on the Calder Freeway May. Credit:Eddie Jim

Emergency services were called to the freeway near Milleara Road in East Keilor about 8.35am on May 24 after the petrol tanker collided with a number of vehicles.

The truck crashed into several cars before flipping on its side, spilling 20,000 litres of fuel on the road.