10×20 Concrete Slab (6 inches): Yards, Feet & Bags
A 10×20 slab at 6 inches is a common size for patio or gazebo base. It’s usually manageable with bags, but if access is easy you may prefer ready-mix for speed and consistency.
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Quick Answer
Tip: Always confirm the yield printed on your bag label. Bag yield guide
Large pour: consider ready-mix delivery for speed and consistent results. Bag counts this high can take significant mixing time.
Project Notes (Unique)
Round to 0.25 yd³ when ordering and ensure delivery access for the truck.
Ensure your base is well-prepared and consider thickened edges for added strength.
Apply a smooth finish and keep the slab moist during the curing process for optimal results.
How to Estimate This Slab in 3 Steps
Measure
Length 10 ft, width 20 ft, thickness 6 in.
Compute Volume
Area: 200 sq ft → volume: 100.0 ft³ → 3.70 yd³.
Add Waste
Add a small buffer for spillage and uneven subgrade, then round up when ordering.
Planning Notes
Common uses: patio, gazebo base, walkway section.
For more context and conversions, see the Concrete Calculator hub.
Frequently Asked Questions
What should I consider when choosing between bagged concrete and ready-mix?
Consider your project's size and access; ready-mix is convenient for larger areas, while bags offer flexibility for smaller jobs.
How do I account for waste when estimating concrete?
Always add a buffer to your calculations to cover spillage and over-excavation; this helps prevent shortages.
What is the best way to prepare the base for my concrete slab?
Excavate to a stable subgrade, compact the soil, and ensure a level surface to prevent cracking later.
How thick should my concrete slab be for a patio or walkway?
A thickness of inches is generally suitable for patios and walkways, providing strength and durability.
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