Concrete Slab Calculator

Free concrete slab calculator: enter the width, length and thickness and get the area and the volume of concrete in cubic feet and cubic yards. For any rectangular slab - a patio, a shed or garage pad, a driveway, a sidewalk or a pool deck. Pick the concrete to add it to the materials, and tick Include Patterns or Include Rebars: the calculator also adds the labor hours for the pour, more with patterns or rebar, ready to price the job in a GetCost estimate. Example: a 12 x 12 foot patio 4 inches thick is 144 sq ft and needs 48 cubic feet of concrete: 1.8 cubic yards. How to calculate it: multiply the length by the width by the thickness, all in feet (4 inches = 0.333 ft, 6 inches = 0.5 ft), then divide by 27 to get cubic yards. That is the exact volume - order about 10% more for waste, spills and uneven ground. An 80 lb bag of concrete mix makes about 0.6 cubic feet; past a cubic yard or two, ready-mix by the yard is usually simpler. Patios and walkways are usually 4 inches thick, driveways and garage floors 5 to 6 inches.

• Concrete Slab Calculator
• Width
• Length
• Thickness
• Concrete
• Comments
• Include Patterns
• Include Rebars