8×16 Concrete Slab (6 inches): Yards, Feet & Bags
A 8×16 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.
Choose Your Calculator
Slab Calculator
Enter any custom length, width, and thickness to get cubic yards and bag counts.
Open Slab CalculatorBag Calculator
Choose 40/60/80 lb bag sizes and estimate counts for your exact volume.
Open Bag CalculatorWant other sizes? Browse all slab size pages
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)
When ordering, round to 0.25 yd³ and check yield on the label to ensure you have enough material for your project.
Ensure your base is well-compacted and your forms are sturdy to prevent shifting during pouring.
After finishing, allow the concrete to cure properly in a shaded area to minimize cracking and ensure durability.
How to Estimate This Slab in 3 Steps
Measure
Length 8 ft, width 16 ft, thickness 6 in.
Compute Volume
Area: 128 sq ft → volume: 64.0 ft³ → 2.37 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 deciding between bags and ready-mix for my slab?
Consider your access to the site and the scale of your project; ready-mix is often easier for larger jobs.
How can I ensure I have enough concrete for my project?
Always account for a waste factor; measuring your area carefully and adding a buffer is crucial.
What is the best way to prepare the base for my slab?
Ensure the base is compacted and level, and consider using gravel for drainage to prevent settling.
How thick should my slab be for a patio or walkway?
A thickness of around inches is generally sufficient for most patio and walkway applications, providing durability.
Related Slab Sizes
Ready to Calculate Your Project?
Get instant estimates for cubic yards, cubic feet, and bag counts. No signup required.