Material Cost Calculator
Total your materials with waste, delivery and GST so quotes don't bleed margin.
General tool only. This calculator gives estimates based on the values you enter. Always check your contract terms and any state-specific rules before relying on the figures.
Enter unit cost and quantity to see this row's subtotal.
Include GST (10%)
Applied to combined subtotal + waste + delivery.
Results
Enter unit cost and quantity to calculate the material cost.
How it works
Behind the numbers
Most material types need a waste allowance to cover off-cuts, breakage, and over-ordering. Delivery is added on top, then GST.
Formula
The maths, written out
Subtotal = Unit × Qty Waste = Subtotal × Waste% Total = Subtotal + Waste + Delivery + GST
Worked example
A quick scenario
45 m³ of concrete at $280 = $12,600 subtotal; +8% waste ($1,008) + $450 delivery = $14,058; +10% GST = $15,464 total.
Frequently asked
Is this calculator free to use?
Yes. All calculators on Contractor Calc are free and do not require sign-up.
How accurate are the results?
The calculators use standard formulas. Results are estimates only and depend on the values you enter. Always check against your contract.
Can I export the results?
Most calculators include a download or copy-to-clipboard option for sharing with clients or storing in your records.