Project category
Concrete & Masonry calculators
Volume, slab, footing and masonry material calculators.
- Concrete Slab CalculatorEnter slab dimensions in metres and millimetres to get the cubic metres of pre-mixed concrete to order, with wastage and an optional GST-aware cost estimate.
- Concrete Volume CalculatorEnter your pour dimensions in metres and millimetres — rectangular slabs and footings or cylindrical post holes — to get the cubic metres of pre-mixed concrete to order, with wastage and an optional GST-aware cost estimate.
- Concrete Cost Calculator Australia — Delivered QuoteTurn a current premixed concrete supplier quote into an itemised AUD supply total while keeping physical volume, billed volume, fees and GST separate.
How these concrete & masonry calculators work
Each calculator starts from site measurements in metres and millimetres, converts them with a tested formula, shows the exact quantity and your waste allowance as separate lines, then rounds up to the package or order unit you actually buy. Prices are optional and always entered by you, so the estimate reflects your supplier rather than a national average.
Concrete & Masonry measuring guides
Step-by-step guides with worked examples and reference tables for Australia.
- How Many 20 kg Bags of Concrete Do You Need? (Australia)Work out how many 20 kg bags of premixed concrete you need in Australia: 108 bags per cubic metre, bag counts by volume, post-hole tables, and a worked example.
- Concrete Price per m³ in Australia: What a Delivered Quote IncludesConcrete cost per m³ in Australia is the rate × ordered m³ plus short-load, waiting and after-hours fees and GST. Published fees by city and slab cost per m².