small concrete slab

[emmjan]

a slab of concrete 1.3mX600mmX150mm

how many bags of concrete mix do I need?

[MitchellMc]

Welcome to the Bunnings Workshop community @emmjan. It's sensational to have you join us, and many thanks for your question about calculating concrete bags requirements.

This is likely a one-off, but for the benefit of other readers coming across this discussion, you can find a variety of helpful calculation tools on the Cement Austalia website. You would need 0.117 cubic metres, which is 14 x 20kg bags of concrete.

You might also like to check out this helpful step-by-step guide: How to pour a concrete slab.

Please let me know if you have any questions.

Mitchell