🧱Concrete Calculators - Calculate Cubic Yards, Bags & Volume
Ordering the right amount of concrete saves you real money on every project. Whether you're pouring a slab, setting footings, forming columns, or building a retaining wall, our calculators give you exact cubic yards and bag counts before you place a single order. Stop guessing and stop overordering—get the precise numbers you need to budget accurately and finish without waste.
Concrete Calculator
Calculate the exact amount of concrete you need for any project — whether you're pouring a driveway slab, setting footings for a deck, or filling column forms. Enter your dimensions and our free concrete calculator instantly tells you how many cubic yards and how many 40lb, 60lb, or 80lb bags you need, with a 10% waste factor included.
Use Calculator →Concrete Slab Calculator
Calculate the exact amount of concrete needed for any slab project — patios, garage floors, driveways, pool decks, and foundation slabs. Enter your slab length, width, and thickness, and our calculator returns cubic yards and 80 lb bag counts with a 10% overage already factored in. Getting the right thickness is critical: under-specifying depth is the most common cause of slab cracking.
Use Calculator →Concrete Footing Calculator
Estimate the amount of concrete needed for continuous wall footings or individual pad footings. Enter the dimensions of your footing to calculate the volume in cubic yards.
Use Calculator →Concrete Column Calculator
Calculate the concrete needed for round columns, sonotubes, or piers. Enter the diameter and height of your column along with the number of columns to get total volume.
Use Calculator →Concrete Wall Calculator
Estimate concrete for poured walls including foundation walls, retaining walls, and stem walls. Enter length, height, and thickness for cubic yard calculations.
Use Calculator →Concrete Driveway Calculator
Plan your driveway project with our concrete driveway calculator. Enter length, width, and thickness to determine how much concrete you need and estimate costs.
Use Calculator →Concrete Stairs Calculator
Estimate concrete for poured stairs and steps. Enter the number of steps, rise, run, and width to calculate the total volume of concrete required.
Use Calculator →Rebar Calculator
Calculate the number of rebar pieces and total weight needed for your concrete slab, footing, or wall. Enter dimensions and bar spacing to get accurate estimates.
Use Calculator →Mortar Calculator
Estimate the amount of mortar mix needed for brick laying, block work, and stone veneer projects. Enter the wall area and joint dimensions to calculate the number of bags required.
Use Calculator →Why Use Our Concrete & Cement Calculators?
Concrete is one of the more expensive materials on any job site, running $125–$150 per cubic yard for ready-mix delivered. Even a single cubic yard over your actual need adds $150 to your bill, and returning excess concrete isn't an option once it's mixed. Underordering is just as costly: a second delivery means another truck charge, and the cold joint between pours can weaken the finished structure.
Our calculators handle the geometry so you don't have to. Input your dimensions and get the exact volume, then choose your bag size (40 lb, 60 lb, or 80 lb) to see how many bags you'll need for smaller pours. For larger jobs, the cubic yard output lets you call your ready-mix supplier with a confident number. You'll also know exactly when it makes economic sense to switch from bags to a ready-mix order.
Pro Tips for Concrete & Cement Projects
- 1Add a 10% waste factor to any calculated volume to account for spillage, uneven subgrades, and form imperfections.
- 2Use 80 lb bags for jobs under ¼ cubic yard—they're more economical per pound than smaller bags.
- 3Order ready-mix for any pour over 1 cubic yard; hand-mixing bags above that threshold is extremely labor-intensive.
- 4Account for rebar and wire mesh slightly reducing usable volume in thick slabs, though the effect is minor.
- 5Order concrete for a full slab on a single pour whenever possible—cold joints between separate pours are structural weak points.
- 6In hot weather, request a lower slump and plan to pour early in the morning to prevent rapid setting.
- 7Always confirm your subgrade is compacted and level before calculating final depth—low spots add unexpected volume.
In-Depth Guide
How Much Concrete Do I Need? Complete Guide
Step-by-step instructions, formulas, and expert advice for your project.