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.
- FlooringCarton count for laminate and vinyl plank, with the cutting allowance and the square feet left over.
- PaintWall area minus openings, times the coats, divided by the spread rate on the tin.
- Roof pitchPitch, angle and rafter length from rise and run, or the rise from a known angle.
- 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.
What you get is a shopping list
Rounding always goes the way that protects the job: never down. The cutting allowance is applied to the quantity before it is divided into units, not after, so it cannot be rounded twice. And every assumption behind the figure - spread rate, bag yield, waste - is a field you can set to whatever your own product says.
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.