Concrete & masonry calculators

Every pour and every wall: slabs, footings, columns, steps, bags, rebar, block, brick and mortar — yards and m³ side by side. Every one works in feet and inches or in metric — flip the switch at the top and the numbers you have typed convert with it.

• Concrete yards, bags & volume from slab dimensions
• Concrete slab yards & bags for a floor, pad or patio
• Concrete footing yards & bags for strip and pad footings
• Concrete column yards & bags for round piers and sonotubes
• Post hole concrete bags per hole, net of the post, for a run of posts
• Concrete stairs concrete volume for poured steps
• Concrete bags bag count from a volume or dimensions
• Rebar grid count, linear length & ties
• Block wall concrete block count for a wall
• Brick brick count for a wall area
• Mortar bags of mortar for block or brick
• Concrete wall yards & m³ for a poured wall, less openings
• Concrete weight weight of a slab, block or pour from your density
• Rebar spacing bars in a run at your spacing, with laps

Which one do I need?

Concrete is ordered by volume — cubic yards in the US, cubic metres in Canada and most of the world — and every calculator here shows both. Bagged mix is counted by the yield printed on your bag, which you can type in.

• How many yards for a slab, pad or patio? Concrete slab calculator →
• Footings under a wall or a deck? Concrete footing calculator →
• Round piers or sonotubes? Concrete column calculator →
• Setting fence or deck posts? Post hole concrete calculator →
• Only need bags, not a truck? Concrete bags calculator →
• Laying out steel in a slab? Rebar calculator →
• How many blocks or bricks? Block wall calculator →
• A poured foundation wall? Concrete wall calculator →
• How heavy is that slab or pier? Concrete weight calculator →

The other drawers

• Framing & carpentry
• Site & landscape
• Finishes & interior
• Measure & layout
• Electrical
• Plumbing & HVAC
• Shop & equipment
• Conversions
• Every tool