How Many Yards per Bag of Concrete?
Convert 40, 60, and 80 lb concrete bags into cubic yards, cubic feet, bag counts per yard, pallet checks, and ready-mix comparisons.
How many yards per bag of concrete depends on the bag yield. A common 80 lb bag yields about 0.60 ft3, which is about 0.0222 yd3. A common 60 lb bag yields about 0.45 ft3, or 0.0167 yd3. A common 40 lb bag yields about 0.30 ft3, or 0.0111 yd3.
Use the Concrete Bag Calculator when you know the slab dimensions. Use the How Many 80 lb Bags of Concrete in a Yard guide if you only need the one-yard conversion. If the bag count is high, compare delivery in the Ready-Mix vs Bags Calculator.
Competitor pages such as ConcreteCalculator.pro's concrete bag calculator and ConcreteCalculatorMax's concrete bag calculator focus on bag counts. This page answers the reverse query: yards per bag.
Quick answer
Use this conversion:
cubic yards per bag = bag yield ft3 / 27
| Bag size | Common yield | Yards per bag | Bags per yd3 |
|---|---|---|---|
| 40 lb | 0.30 ft3 | 0.0111 yd3 | 90 |
| 60 lb | 0.45 ft3 | 0.0167 yd3 | 60 |
| 80 lb | 0.60 ft3 | 0.0222 yd3 | 45 |
These are planning conversions only. Specialty mixes can have different yields. Confirm the printed yield, slab thickness, base prep, reinforcement, and jobsite requirements with a qualified local professional.
Example conversions
| Bags | 40 lb bags | 60 lb bags | 80 lb bags |
|---|---|---|---|
| 10 bags | 0.11 yd3 | 0.17 yd3 | 0.22 yd3 |
| 25 bags | 0.28 yd3 | 0.42 yd3 | 0.56 yd3 |
| 50 bags | 0.56 yd3 | 0.83 yd3 | 1.11 yd3 |
| 100 bags | 1.11 yd3 | 1.67 yd3 | 2.22 yd3 |
This table helps sanity-check pallets and partial jobs. If someone says a small slab needs one yard but the shopping list has 20 bags, the numbers do not match.
Why yards per bag matters
The yards-per-bag number helps with:
| Use case | How to use it |
|---|---|
| Store trip planning | Convert bag count into equivalent yards. |
| Ready-mix comparison | Compare bag cost with delivered yard price. |
| Pallet checks | Convert a pallet into cubic yards before buying. |
| Quote review | Confirm whether a bid is using bagged or ready-mix assumptions. |
For pallet math, see How Many Bags of Concrete on a Pallet and How Many Yards Is a Pallet of Concrete.
Quick audit example
Suppose a quote or shopping list says a repair needs 30 common 80 lb bags. Using 0.0222 yd3 per bag, that is about 0.67 yd3 of concrete before any additional waste. If a supplier minimum is 3 yd3, bagged concrete may still be the simpler material path. If the same project grows to 90 bags, that is about 2 yd3, and ready-mix deserves a delivered quote.
This reverse conversion is useful because many DIY decisions start with a store cart, while contractor and supplier conversations often use cubic yards.
FAQ
How many yards are in an 80 lb bag of concrete?
About 0.0222 yd3 for a common 80 lb bag that yields 0.60 ft3.
How many yards are in a 60 lb bag?
About 0.0167 yd3 for a common 60 lb bag that yields 0.45 ft3.
How many yards are in a 40 lb bag?
About 0.0111 yd3 for a common 40 lb bag that yields 0.30 ft3.
Why does bag yield matter?
Bag weight alone is not enough. The mixed yield printed on the bag is what converts into cubic feet and cubic yards.
How do I use this for a quote?
Convert bags to yards, compare ready-mix or contractor bids in the Concrete Quote Reviewer, and build client scope in the Concrete Proposal Kit.
Quote planning next step
Turn this guide into a concrete buying check
Run the matching calculator, then compare ready-mix, bagged concrete, delivery fees, access needs, and quote gaps before you buy materials or approve a contractor number.