Concrete & Masonry

How Many 80 lb Bags of Concrete Are in a Yard?

You need 45 × 80 lb bags to make one cubic yard of concrete. Here's the math and the counts for 60 and 40 lb bags too.

How Much Does a Bag of Concrete Weigh?

Concrete comes in 40, 50, 60 and 80 lb bags. The number on the bag is its dry weight before you add water.

How Thick Should a Concrete Slab Be?

4 inches is standard for patios and walkways; driveways need 5–6 inches. A thickness chart by application.

How Much Does Concrete Cost Per Yard?

Ready-mix concrete runs about $125–$165 per cubic yard delivered, before short-load and other fees.

How Much Does a Concrete Driveway Cost?

A concrete driveway costs about $6–$18 per square foot installed — roughly $3,600–$10,800 for a typical two-car driveway. A cost breakdown by finish.

Concrete Cost Per Square Foot (Slab, 2026)

A concrete slab costs about $6–$15 per square foot installed — plain gray at the low end, stamped and colored higher. Cost by finish, thickness and project.

How Much Concrete Do You Need for a Sonotube?

A round column is a cylinder: volume = π × radius² × height. A 12-inch tube 4 ft tall takes about 6 × 80 lb bags.

How Much Concrete Do You Need for Stairs?

A solid poured flight is width × run × rise × [1+2+…+n] for n steps. A 4-step, 3 ft-wide flight takes about 0.6 cubic yards.

How Many Square Feet Does a Yard of Concrete Cover?

One cubic yard covers 81 ft² at 4 inches thick. Coverage depends entirely on slab thickness.

How Much Does Concrete Weigh Per Cubic Foot?

Standard concrete weighs about 150 lb per cubic foot — roughly 4,050 lb (about 2 tons) per cubic yard. Here's the weight by volume.

Concrete Footing Size Chart (Width & Thickness)

A footing size chart by number of stories and soil: strip footings run 12–23 inches wide and 6–10 inches thick. Sizing rules and code minimums.

How Many Bags of Concrete Are on a Pallet?

A pallet of concrete holds 42 × 80 lb, 56 × 60 lb, 64 × 50 lb or 80 × 40 lb bags — about 3,200–3,360 lb of mix, near a forklift's safe limit either way.

How Much Is a Yard of Concrete?

A cubic yard of ready-mix concrete costs about $125–$165 delivered, covers 81 ft² at 4 inches thick, and equals 45 × 80 lb bags.

Concrete Estimate Template (Free, with a Sample Quote)

What a concrete estimate should include, a sample line-item quote for a slab, and a free tool to build and download a concrete estimate or quote as a PDF.

How Much Rebar Do I Need for a Concrete Slab?

Work out rebar for a slab: lay a two-way grid at 12–18 in on center, count the bars each way, total the length and add ~10% for laps. Worked example inside.

How Much Does Rebar Cost? (Per Foot, Stick & Ton)

Rebar costs about $0.30–$0.60 per linear foot — roughly $6–$12 for a 20 ft #4 stick, or $700–$1,100 a ton. Price by size, plus what a slab's worth of steel costs.

Rebar Size & Spacing Chart (Weight, Diameter & Grid)

Rebar sizes #3–#6 with diameter and weight per foot, plus the on-center spacing to use by application. A quick reference for sizing a slab mat.

How Many Concrete Blocks Do I Need? (CMU Wall Calculator + Chart)

Multiply your wall area by 1.125 to get the number of standard 8×8×16 concrete blocks. Here's the formula, a blocks-per-square-foot chart, mortar and course counts, and a free calculator.

How Much Does a Concrete Block Wall Cost? (2026 Price Breakdown)

Concrete block walls run about $10–$22 per square foot installed. Here's the cost per block, mortar and labor breakdown, examples by wall size, and a free calculator.

How Many Bricks Do I Need? (Bricks per Square Foot & Mortar)

Bricks per square foot = 144 ÷ ((brick length + joint) × (brick height + joint)). Get the bricks-per-ft² chart by size, the mortar rule of thumb, and a free brick calculator.