How Many Tonnes of Gravel for a Driveway?
A 10 by 3 metre driveway covered with 75 mm of gravel is 2.25 cubic metres. At 1.6 tonnes per cubic metre that is about 3.6 tonnes, or 3.96 tonnes with 10% for waste.
Try your own numbers
Last checked 10/11/2026. Sources: Easy Mix Super Strength Concrete data sheet, Wilson Timbers (about 99 bags of 20 kg per m³); Before You Dig Australia.
Order by weight or by volume
Volume = 10 × 3 × 0.075 = 2.25 m³. Suppliers may sell by the cubic metre or by the tonne, so the page shows both. At 1.6 t/m³ the weight is 3.6 tonnes; with 10% extra it is 3.96.
The density is an editorial starting point, not a standard: crushed rock, river gravel and moist or dry stone all differ, commonly between about 1.4 and 1.7 t/m³. Ask your supplier for their figure and enter it. Compaction also reduces loose volume, which the 10% waste partly covers.
Depth. How much gravel a driveway needs depends on the ground and the traffic. Change the depth box to compare, and ask a landscaper or your supplier about the layers.
Common questions
How many cubic metres is one tonne?
At 1.6 t/m³, a tonne is 0.625 m³. At 1.4 t/m³ it is 0.71 m³.
Does this work for mulch?
Yes, choose mulch. Its starting density is much lower, so suppliers usually sell it by volume.