Category
Concrete & Masonry calculators
Plan slabs, footings, rebar grids and brick walls with confidence. Each tool turns dimensions into the materials you need to order, follows ACI 318 conventions where applicable, and switches between cubic yards, cubic metres, 60-lb / 80-lb sacks and 40-kg sacks without retyping. Concrete and mortar are unforgiving once poured — getting the quantity right the first time saves money and rework.
All Concrete & Masonry calculators
Rebar Calculator
Estimate total length, weight and number of bars for a rebar grid.
Concrete Footing Calculator
Calculate concrete volume, bags and cost for strip, pad or pier footings.
Concrete Slab Calculator
Volume, bags and cost for slabs, driveways, patios and floors.
Brick Calculator
Number of bricks and mortar bags for walls of any size.
What goes into a concrete or masonry take-off
A take-off — the process of converting a drawing into a quantity to order — combines
simple geometry with two adjustments most spreadsheets miss: waste factor and
compaction. The geometry is straightforward (length × width × depth for a slab,
π · r² · D for a column, summed volumes for stepped footings, face area divided by
brick face for a wall), but the real world adds spillage, over-excavation, broken bricks and a
bit of extra so the truck isn’t arriving short. Our calculators apply a default 5 – 10 %
waste factor that you can tune.
Concrete vs masonry
Concrete is poured monolithically and ordered by volume (yd³ or m³); masonry is laid unit by unit and ordered by piece count (bricks, blocks) plus mortar. The two are related — mortar is a cement-based product and most masonry sits on a concrete footing — which is why we keep them in the same family. Pick the calculator that matches what you’re actually buying.
Imperial vs metric units
In the U.S., concrete is ordered by the cubic yard (1 yd³ ≈ 0.7646 m³ ≈ 27 ft³). Internationally, it’s the cubic metre. Our tools show both, plus equivalent bag counts at the most common sizes — 60 lb (yields ≈ 0.45 ft³), 80 lb (≈ 0.60 ft³), and 40 kg (≈ 0.019 m³) — so a contractor and a DIYer working off the same plan can each see the number that matters to their supplier.
What these calculators don’t replace
For any structural slab, foundation or load-bearing element, a stamped design from a licensed engineer is required. Our calculators help you estimate, sanity-check, and bid faster — they are not a substitute for ACI 318 design checks, soil reports, or local code review.