Free project planning tool
Concrete Calculator
Rectangular slab material quantity only. This is not structural or engineering advice.
How it works
Rectangular slab material quantity only. This is not structural or engineering advice.
Important assumptions
Bag yield is a visible, editable assumption; confirm the product label.
Understand this estimate
Slab length, width, and thickness produce volume; the selected overage and bag yield convert that volume to a rounded bag estimate.
Important limits
This is material quantity only, not structural, load, reinforcement, mix-design, or foundation guidance.