Concrete Calculator
Calculate exactly how much concrete you need for any project. Get instant volume calculations, bag counts, and cost estimates for slabs, driveways, footings, and more.
Dimensions
Pro Tips
- →Measure to the nearest inch for accuracy
- →Add 5-10% extra for waste and spillage
- →Consider ground conditions when ordering
Includes 10% waste factor
Cost Estimate
Estimated material costs for your project
Recommendation: Ready-Mix Concrete
For projects over 1 cubic yard, ready-mix is typically more economical and easier to work with.
123 bags × 80lb
2.72 cubic yards + delivery
200 sq ft × $5.50/sq ft
Prices vary by location and time. Contact local suppliers for accurate quotes.
Shape Types
Slabs, cylinders, curbs, stairs, columns, walls, footings, circles, and tubes
Always Free
No signup required. Calculate unlimited projects with full features
Units
Imperial and metric support for projects anywhere
Project Calculators
Pre-configured calculators for specific project types with tailored defaults and tips.
Concrete Column Calculator
Calculate concrete needed for columns and pillars with our free tool. Get accurate volume estimates for cylindrical columns.
Concrete Cost Calculator
Estimate your concrete project costs with our free calculator. Get detailed breakdowns for materials, delivery, and labor.
Concrete Curb Calculator
Building concrete curbs? Calculate exactly how much concrete you need with our free tool. Get instant curb estimates.
Concrete Deck Footing Calculator
Building a deck? Calculate concrete needed for deck footings with our free tool. Get accurate estimates for post hole concrete.
Concrete Driveway Calculator
Planning a driveway? Calculate exactly how much concrete you need with our free tool. Get cubic yards, bag quantities, and cost estimates for your driveway project.
Concrete Driveway Cost Calculator
Estimate your driveway costs with our free calculator. Get detailed pricing for materials, labor, and total installation cost.
Concrete Footing Calculator
Calculate concrete needed for footings with our free tool. Get accurate estimates for foundation supports and column bases.
Concrete Foundation Calculator
Planning a foundation? Calculate concrete needs for foundation walls and footings with our free tool.
Concrete Garage Floor Calculator
Planning a garage floor? Calculate exactly how much concrete you need with our free tool. Get instant estimates for your garage slab.
Concrete Patio Calculator
Planning a patio? Use our free calculator to determine how much concrete you need. Get instant estimates for volume, materials, and costs.
Concrete Patio Cost Calculator
Estimate your patio costs with our free calculator. Get detailed pricing for basic or decorative concrete patio installation.
Concrete Pier Footing Calculator
Building pier footings? Calculate concrete needs with our free tool. Get accurate estimates for pier foundations.
Concrete Post Hole Calculator
Setting posts? Calculate exactly how much concrete you need for post holes with our free tool.
Concrete Shed Foundation Calculator
Building a shed foundation? Calculate exactly how much concrete you need with our free tool. Get instant estimates for your shed pad.
Concrete Sidewalk Calculator
Building a sidewalk? Calculate exactly how much concrete you need with our free tool. Get instant estimates for your walkway project.
Concrete Slab Calculator
Calculate concrete needed for any slab project. Our free tool provides accurate estimates for volume, materials, and costs.
Concrete Slab Cost Calculator
Estimate your concrete slab costs with our free calculator. Get detailed pricing for materials, labor, and total project cost.
Concrete Steps Calculator
Building concrete steps? Calculate exactly how much concrete you need with our free tool. Get instant estimates for stairs.
Concrete Walkway Calculator
Planning a walkway or garden path? Calculate your concrete needs with our free tool. Get instant volume and cost estimates.
Sonotube Concrete Calculator
Using sonotubes? Calculate exactly how much concrete you need with our free tool. Get accurate estimates for any tube size.
Expert Guides
Learn the right way to calculate, pour, and finish concrete projects.
4 Inch vs 6 Inch Concrete: When to Go Thicker
**Use 4 inches for foot traffic (patios, sidewalks). Use 5-6 inches for vehicles (driveways, garage floors).** That's the core rule. The extra thickness costs roughly $0.50-1.00 per square foot—worth it where needed, wasted money where it isn't.
Concrete 101: Everything You Need to Know
Before you calculate quantities or plan your pour, you need to understand what concrete actually is and how it works. This foundation knowledge prevents expensive mistakes—like adding too much water (permanently weakens concrete) or driving on a driveway too soon (causes surface damage).
Best Time to Pour Concrete (Season, Weather, and Temperature)
The ideal temperature for pouring concrete is **50-60°F**, making **spring and fall** the best seasons in most regions. Concrete can be poured outside this range, but extreme heat (above 90°F) or cold (below 50°F) requires special precautions that add complexity, cost, and risk.
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