Concrete Block Calculator
Count concrete blocks (CMU) for a wall from its length, height and openings. A 20 by 8 ft wall of 8×16 blocks needs 180 blocks before waste.
Concrete and Masonry
5 tools
Which Concrete and Masonry tool do you need?
| Tool | What it answers |
|---|---|
| Concrete Block Calculator | Divide the net wall area by the nominal face of one block. |
| Concrete Calculator | Multiply length by width by thickness, all in feet, and divide by 27 to get cubic yards. |
| Concrete Column Calculator | Multiply the column's cross-section area by its height. |
| Concrete Slab Calculator | Multiply length by width by thickness, with every dimension in feet, then divide by 27 to get cubic yards. |
| Concrete Tube Calculator | A round form tube holds π × radius² × height of concrete. |
All tools
Concrete Tube Calculator
Find the concrete for round form tubes from diameter, depth and count, in cubic yards, cubic feet and cubic metres, plus 60 lb and 80 lb bag counts.
Concrete Column Calculator
Work out the concrete for round tube or square columns in yd³, m³ and ft³, with a waste allowance and the number of 60 lb and 80 lb premix bags.
Concrete Calculator
Work out concrete volume for a slab, footing or round column in cubic yards or cubic metres, with a waste allowance and 60 lb or 80 lb bag counts.
Concrete Slab Calculator
Work out the concrete for a rectangular slab in cubic yards, cubic metres and 60 or 80 lb bags, with a waste allowance. A 10 × 10 ft slab at 4 in is 1.23 yd³.