Concrete Bags and Yards

Bags and yards, not just yards. Enter feet, inches and fractions the way you measured them.

Bags and yards, not just yards.

Yardage is the easy half. What you actually order is bags, or a truck rounded up to the quarter yard, and most calculators stop before that. This one gives back four numbers at once: cubic feet, cubic yards, cubic metres, and the number of bags in the size you buy.

Change the bag size and the count changes with it.

The count comes from that bag size and nothing else — 0.60 cubic feet for an eighty pound sack, 0.30 for a forty. Pick the sack you are actually buying and the number on screen is the number you carry to the register.

Enter feet inches and fractions the way you measured them.

Eight foot three and three eighths is stored as three eighths, shown as three eighths, and never quietly becomes 8.375 on the way through. Sixteenths are kept as whole numbers, so nothing is rounded on the way in. Fractions come back reduced — one half, not nine eighteenths.

Order with the overage built in.

Set the allowance once and every number carries it. Yards and bags always round up, never down, because a truck that leaves short stops the job for the afternoon. The scale shows what you measured, what the overage added, and which quarter yard it lands on.

Six shapes, and steps are formwork.

Slab, wall, rectangular column, round column, strip footing, and steps. The steps figure is the volume inside the forms, worked from the rise, the run and the number of risers — it is not a stair layout. Eight presets start you from a common pour instead of an empty form.

One job is rarely one pour.

Put the slab, the footing and the steps into a single project and the totals add across all of them. Send the order sheet to your supplier with every dimension you entered still printed on it.

Check our work.

The How it works screen prints the formulas and the constants: length by width by thickness, pi r squared h for a round column, rise by run by n times n plus one over two for steps, twenty seven cubic feet to the yard. Nothing is held back.

Mix strength, rebar spacing, curing and prices are not decided here.

Those are structural and commercial calls that belong to you and your engineer. A calculator that guesses at them is worse than one that stays quiet about them.

Works offline. No account. Nothing about your job leaves the phone.

Languages: English, 한국어, 日本語, 繁體中文, Deutsch, Français, Español