How to use it
- Enter length in feet.
- Enter width in feet.
- Enter thickness in inches.
- Read cubic feet, cubic yards, and bag estimate.
What this calculator does
It takes the length, width, and thickness of a concrete wall and instantly gives you three key results: total cubic feet, cubic yards, and the number of standard 80‑lb bags needed.
Why it matters
Knowing the exact volume prevents over‑ordering, saves money, and ensures you have enough material on site.
How to read the results
- Cubic feet – raw volume of the wall.
- Cubic yards – same volume divided by 27 (the industry standard conversion).
- Bags – cubic feet divided by 0.6, because each 80‑lb bag yields about 0.6 ft³.
Use these numbers to place accurate orders and avoid costly delays.
Pro tips
- Add a 5‑10% waste allowance before ordering bags.
- Round up bag count to the next whole bag.
- Order a few extra bags for future repairs.
- Double‑check thickness conversion from inches to feet.
Real-life examples
- A homeowner planning a 6‑inch‑thick garden retaining wall.
- A contractor estimating material for a 12‑ft‑high basement foundation wall.
- A DIYer ordering concrete for a small patio retaining edge.
Case study
Mike entered his 10 ft × 12 ft wall at 6 in thickness and saw 60 ft³, 2.2 yd³, and 100 bags. He ordered exactly 100 bags, avoided a $150 over‑order, and completed his project on budget.