14×20 Concrete Slab (6 inches): Yards, Feet & Bags
This 14 ft x 20 ft slab is perfect for a patio or gazebo base. Decide between bags or ready-mix based on your access and project size.
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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 check yield on the label to ensure you have enough material.
Ensure your base is well-prepared and forms are secure, especially for thickened edges to prevent shifting.
Finish the surface as desired and allow adequate time for curing under favorable conditions to achieve strength.
How to Estimate This Slab in 3 Steps
Measure
Length 14 ft, width 20 ft, thickness 6 in.
Compute Volume
Area: 280 sq ft → volume: 140.0 ft³ → 5.19 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 bags and ready-mix concrete?
Consider your access to the site, the volume needed, and how much time you have for mixing.
How do I ensure I have enough concrete for my project?
Factor in a waste buffer and round your calculations up to account for any spillage or miscalculations.
What is the best way to prepare the base for my concrete slab?
Clear the area of debris, level the ground, and compact the soil to create a stable foundation.
How thick should my concrete slab be for a patio?
A thickness of inches is generally suitable for most patio applications, providing durability and support.
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