Volume, bags, and yardage for slabs, footings, posts and flatwork. Start with the main concrete calculator, or jump to the project page that matches what you are pouring.
Concrete Calculator
Estimate concrete volume in cubic yards or bags. For slabs, footings, posts, and walls.
Open calculator →Concrete Bag Calculator
Concrete bag calculator. Find how many 40, 50, 60, 80, or 90 lb bags of concrete you need for a slab, footing, or post — plus water, weight, and cost.
Open calculator →Concrete Patio Calculator
Patio concrete calculator. Calculate exactly how many cubic yards or bags of concrete you need for your patio. Standard 4-inch thickness with cost estimates.
Open calculator →Concrete Driveway Calculator
Driveway concrete calculator. Calculate cubic yards and bags for your driveway project. Covers single-car, double-car, and custom sizes with cost estimates.
Open calculator →Concrete Sidewalk Calculator
Sidewalk concrete calculator. Calculate cubic yards or bags of concrete for a walkway or sidewalk, with standard widths, 4-inch thickness, and cost estimates.
Open calculator →Concrete Curb Calculator
Concrete curb calculator. Estimate yards or bags for a curb, gutter, or landscape edging, with standard curb dimensions and cost estimates.
Open calculator →Fence Post Concrete Calculator
Fence post concrete calculator. Calculate how many bags of concrete you need per post and for your entire fence. Covers 4x4 and 6x6 post sizes.
Open calculator →Post Hole Concrete Calculator
Post hole calculator. Concrete volume net of the post itself, bags by 40, 50, 60 and 80 lb size, plus gravel for the hole bottom and hole depth guidance.
Open calculator →Dry Pour Concrete Calculator
Dry pour concrete calculator. Estimate bags and misting water for a dry pour slab, plus an honest look at where the dry pour method works and where it fails.
Open calculator →Deck Mud Calculator
Estimate dry-pack mortar bed (deck mud / floor mud) volume, plus the sand and cement for shower floors and tile beds.
Open calculator →Concrete Guides
Longer reads that pair with these calculators — costs, comparisons and step-by-step walkthroughs.