Concrete Calculator
Project Shape
Always entered in inches
Price per cubic yard
$/yd³ — edit to match your area
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Your Results
Includes waste factor
Cubic Yards
—
yd³ needed
Cubic Feet
—
ft³
60 lb Bags
—
bags (0.45 ft³ each)
80 lb Bags
—
bags (0.60 ft³ each)
Est. Material Cost
—
ready-mix concrete
Coverage Area
—
square feet
Hardware Store Shopping List
Concrete Mix (80 lb bags — Quikrete / Sakrete)
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Water (approx. per batch)
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Plastic Sheeting (curing, 6 mil)
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Rebar #4 (optional, for slabs over 4")
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2×6 Form Boards (for perimeter)
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Concrete Sealer (after 28-day cure)
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⚠️ Always add 5–10% extra to your order. Running short mid-pour creates cold joints that can compromise structural integrity.
More Calculators
Professional tools for every material and project type
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Bags of Concrete
How many 40lb, 60lb, or 80lb bags do you need? Get exact counts before you head to Home Depot or Lowes.
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Posts needed, concrete bags per post, and full material list for any fence length and spacing.
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Square Footage
Quickly calculate area in square feet for rooms, yards, or any project space. Add multiple areas together.
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Cubic Yards
Universal cubic yards converter for any material. Enter dimensions in feet or inches and get instant yard totals.
Convert to Yards
Project Guides
Plain-English walkthroughs for common concrete projects
Concrete Driveway
How thick, what PSI, rebar or mesh? Full guide for a residential or commercial driveway pour.
Backyard Patio
3–4 inch slabs for foot traffic. Material list, form building, and curing tips.
Fence Post Footings
Depth, diameter, and how many bags of Quikrete per post for a solid, lasting fence.
Gravel Driveway
Depth recommendations, compaction layers, and ton calculations for crushed stone driveways.
Frequently Asked Questions
How much concrete do I need? Answers to the most common project questions.