Concrete Calculator & Bags

Order the right amount, once: slab-to-stairs volumes with waste, bag counts or a ready-mix truck order rounded the way plants batch.

The builder's concrete calculator — pour volumes and bag counts in one honest tool.

Pick the shape — slab, rectangular or circular column, beam, footing, stairs or a cylindrical hole — enter the dimensions and read the volume instantly. Set how many identical elements you are pouring and add a waste allowance. In Bags mode, choose a 25, 30 or 40 kg premix bag with typical yields, or enter your product's exact bag mass and yield from its data sheet, and get the number of bags plus the total dry-mix weight to haul.

PRO • Ready-mix ordering: the truck order rounded up to 0.25 m³ batching steps, with the bag alternative alongside • Multi-element project list: combine slab, columns and footings into one total volume and bag count • Save calculations to history • Share clean PDF reports

Metric or imperial (m / ft-in, m³ / yd³). Built for gloves and sunlight: big keypad, huge results, Outdoor Bright mode.

Everything stays on your phone — fully offline, no account, no tracking.

Results are estimates only; always confirm quantities with your supplier.

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