Concrete & Masonry Calculators
Slabs, footings, block and mortar - by the bag or by the truck. 16 free calculators.
Concrete and masonry projects are unforgiving of a bad estimate: order too little and you get a visible cold joint where an old pour meets a new one, order too much and you're paying for a full ready-mix delivery, or a pile of unused bags, you didn't need.
These calculators convert a slab, footing, wall or block count into both the ready-mix cubic yards a truck is priced by and the bag count a hand-mix project needs, with an industry-standard waste allowance already built in.
Last reviewed September 2026
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Concrete Slab Calculator
Cubic yards, ready-mix vs. bags, and waste for a slab, patio or footing
Concrete Footing Calculator
Volume for a strip footing, sized separately from the slab above it
Concrete Block Calculator
Block count and mortar bags for a block wall, by wall size
Rebar Weight and Size Calculator
Rebar quantity and weight for a slab or footing grid
All 16 Concrete & Masonry calculators
Concrete Slab Calculator
Concrete slab calculator for patios, sidewalks and pads: get cubic yards, a ready-mix order size and 40, 60 or 80 lb bag counts, with waste included.
Concrete Footing Calculator
Find the cubic yards, ready-mix order size and 40, 60 or 80 lb bag count for a strip footing trench, with 8% waste and an optional price included.
Concrete Block Calculator
Work out the 8x8x16 concrete blocks and 80 lb mortar bags for a CMU wall, with door and window openings subtracted, breakage included, and optional costs.
Concrete Block Fill Calculator
Estimate core-fill grout for CMU block walls, from reinforced-cell partial grouting to solid grouting, in coarse or fine grout, with waste included.
Concrete Mix Calculator
Batch concrete from raw materials: get the portland cement bags, sand and gravel for a target volume at the 1:2:3 mix, with 5% waste included.
Concrete Reinforcing Mesh Calculator
Work out the 5x10 ft sheets or 5x150 ft rolls of 6x6 welded wire mesh for a slab, with splice overlap and trim waste included, plus an optional cost.
Concrete Steps Calculator
Get the concrete volume, ready-mix order size and bag count for a solid poured staircase, from the number of steps, rise, run and width you enter.
Concrete Weight Calculator
Find how much a poured slab or footing weighs in pounds and tons, from its length, width, thickness and an adjustable concrete density input.
Rebar Weight and Size Calculator
Look up the nominal diameter and weight per foot for US rebar sizes #3 through #18, and get the total weight for any length you enter, in lb and tons.
Rebar Material Calculator
Get the rebar sticks, total length and weight for a two-way grid in a slab or footing, with cover, spacing, waste and bar size all adjustable.
Block Mortar Calculator
Get the 80 lb mortar mix bags you need for a set number of 8x8x16 blocks or standard bricks, with waste and an optional bag price included in the result.
Concrete Sealer Calculator
Estimate concrete sealer for a patio, driveway or garage floor by area, sealer type and number of coats, with gallons rounded up for easy ordering.
Excavation Calculator
Estimate the bank and loose soil volume for a dig in cubic yards, plus the truck loads to haul it away, adjusted for soil type and truck size.
ICF Block & Concrete Calculator
Get the ICF block count and concrete fill in cubic yards for a wall, from its length, height and a 4, 6 or 8 in. core width, with both results rounded up.
Epoxy/Resin Coating Calculator
Estimate epoxy or resin gallons for a garage floor, countertop or bar top from area, product coverage and number of coats, rounded up for ordering.
Crawl Space Vapor Barrier Calculator
Work out how many rolls of crawl space vapor barrier sheeting you need for a floor, with seam overlap included and roll coverage you can adjust.