Concrete & masonry calculators
Slabs, footings, post holes, steps and block walls. Measure once, then get yards for the truck, bags for the store and the rebar and mortar that go with them.
Concrete Calculator
Pick a shape, enter its size, add more sections if the job has them, and get yards, bags and trucks with the math shown.
Open the Concrete CalculatorConcrete
Concrete Calculator
Pick a shape, enter its size, add more sections if the job has them, and get yards, bags and trucks with the math shown.
Concrete Slab Calculator
Enter the slab by length and width or by square feet, pick the thickness, and get yards, bags and a price range for your state.
Concrete Bag Calculator
Enter what you are pouring and get the number of bags in every size, the water to mix them and the weight to haul home.
Concrete Yard Calculator
Enter each part of the pour and get the cubic yards to order, how many trucks bring it and what to tell the supplier.
Concrete Footing Calculator
Add the footings, pads and foundation walls of the job and get yards, bags and trucks, with an IRC check on footing size and depth.
Post Hole & Sonotube Concrete Calculator
Concrete per post hole = π × (diameter ÷ 2)² × filled depth − the post: a 10 in hole filled 30 in deep around a 4x4 holds 1.15 cu ft, about 1.9 bags of 80 lb, and a 12 in sonotube 4 ft deep holds 3.14 cu ft.
Concrete Steps Calculator
Enter the steps, their rise and run, the width and the landing at the top, and get concrete, bags and a code check.
Self Leveling Concrete Calculator
Bags of self-leveler = area × average depth ÷ the bag's coverage: a 20 × 15 ft floor leveled ¼ in deep takes 16 bags of Quikrete 50 lb with 10% extra.
Concrete Mix Ratio Calculator
A 1:2:3 mix at a 0.55 water-cement ratio makes 4.3 cu ft per 94 lb bag of cement, so a 10 × 10 ft slab 4 in thick takes 9 bags, 17 cu ft of sand and 25 cu ft of gravel.
Rebar
Block & brick
Cinder Block Calculator
Enter a wall, foundation, steps or square feet and get concrete blocks (cinder, cement or CMU) by type, mortar bags, core fill grout and rebar.
Brick Calculator
Pick what you are building and the brick size, enter the size and get the brick count, bricks per square foot and mortar bags.
Mortar Calculator
Enter a wall or a unit count, pick a bagged mix or your own recipe, and get bags of mortar or cement, lime and sand.
Stucco Calculator
Stucco bags = wall area × coat thickness ÷ 8.25 sq ft-inches per 80 lb bag: a 1,000 sq ft wall in 3-coat work takes 116 bags with 10% extra, 50 for each base coat and 16 for the finish.
Stone Veneer Calculator
Flats = wall area − openings − corner feet × 0.67 sq ft, plus 10%: a 20 × 8 ft wall with 30 sq ft of openings and two 8 ft corners takes 131 sq ft of flats and 17.6 linear ft of corners.