Compare Like with Like
This tool does not guess local ready-mix prices or declare one option the winner. Enter the actual bag shelf price and a written ready-mix quote so the two material totals use the same volume.
Bag calculation
The bag count is volume × 108, rounded up to a whole 20kg bag. The total dry bag weight is the rounded bag count × 20kg. Bag cost is calculated only when you enter a shelf price.
Ready-mix calculation
The ready-mix total is volume × your quoted price per cubic metre, plus the delivery and other quoted fees you enter. Suppliers may apply minimum loads, waiting time, distance, strength-grade, small-load, after-hours or pump charges. Enter the supplier's complete quote rather than relying on a national average.
Cost is only one part of the decision
Access, placement time, available equipment, product specification and the ability to complete a continuous pour can matter as much as the material total. This calculator does not assess those project requirements.
See the methodology and source list for the yield assumption and pricing policy.