What this concrete bag calculator calculates
Bag count depends on the package yield, not the bag weight alone. The cited 80 lb product yield is 0.60 ft³ per bag, so 10 ft³ needs 17 bags before waste.
Formula
Required volume ÷ selected package yield = bags, rounded up to a whole package.
Worked example
A 10 ft³ pour at a 0.60 ft³ 80 lb yield is 16.67 bags, so the order rounds to 17 bags before any waste allowance.
Ordering decision
Compare the 80 lb, 60 lb, and metric rows on the reference table because local products use different yields.
The page cites the applicable Uzi Tools reference table beside the calculator. Product labels, current editions, local code, and a licensed professional govern structural, electrical, and life-safety work.
How to use it
- Enter the measured dimensions and keep the displayed units beside each field.
- Review the convert concrete volume into bags result and the substituted formula before ordering.
- Adjust waste for the layout, cut pattern, product package, and site conditions.
- Copy or print the material list, then verify the cited product data and local requirements.
Convert concrete volume into bags
This concrete bag calculator converts a known volume into 40, 50, 60, and 80 lb US bags plus 20 and 25 kg packages. It answers the ordering question after the slab, footing, or post-hole volume is known.
Limits and professional review
Measurements, product yield, waste, moisture, and site conditions can change the order quantity. Local code and a licensed professional govern structural and electrical work.