Construction calculators that answer in bags, tins and boxes
Work out what a job actually needs — concrete for a slab, paint for a room, tiles for a floor — and get the answer in the units the shop sells, not just in cubic yards.
Pick a calculator
- ConcreteCubic yards for the truck, or the bag count if you are mixing on site.
- PaintWall area minus openings, times the coats, divided by the spread rate on the tin.
- TilesTile count and box count, with the grout joint and the cutting allowance included.
How it works
- MeasureEnter the room or the pour in feet, inches or metres. The tool converts, you do not.
- ChoosePick the bag, tin or box you can actually buy, and the waste allowance for the job.
- BuyTake the count to the merchant. Everything countable is rounded up, never down.
Where the numbers come from
One calculation engine serves every tool and every language, so the worked example on the page and the calculator above it can never disagree — they are the same code. Each result lists the constants it used and the date they were last checked, and any figure you disagree with is an editable field.
In this market
Ready-mix is ordered by the cubic yard and a truck carries about 10. Suppliers set their own minimum, commonly 3 to 5 yards, and charge a short-load fee of roughly $50 to $150 below it. That threshold, not the arithmetic, is what usually decides between a truck and a pallet of sacks on a small residential pour.