How many 80 lb bags of concrete make a cubic yard?
It takes 45 bags of 80 lb concrete mix to make one cubic yard, or 50 bags with 10% extra for waste. Each 80 lb bag of QUIKRETE Concrete Mix yields about 0.60 cubic feet, and a cubic yard is 27 cubic feet: 27 ÷ 0.60 = 45.
80 lb bags for common slabs at 4 in deep
| Slab | Volume (cu ft) | Volume (cu yd) | Bags, no waste | Bags with 10% |
|---|---|---|---|---|
| 4 × 4 ft | 5.33 | 0.20 | 9 | 10 |
| 8 × 8 ft | 21.33 | 0.79 | 36 | 40 |
| 10 × 10 ft | 33.33 | 1.23 | 56 | 62 |
| 10 × 12 ft | 40.00 | 1.48 | 67 | 74 |
| 12 × 12 ft | 48.00 | 1.78 | 80 | 88 |
| 10 × 20 ft | 66.67 | 2.47 | 112 | 123 |
How we worked it out
- Volume = length × width × depth in feet. Bags = volume ÷ 0.60, rounded up to whole bags.
- The yield (0.60 cu ft per 80 lb bag) comes from QUIKRETE's Concrete Mix No. 1101 data sheet.
- 45 bags weigh 3,600 lb. Every QUIKRETE Concrete Mix size works out to the same 133 lb per cubic foot of yield (80 ÷ 0.60), so 60 lb and 50 lb bags also total 3,600 lb per yard.
- One QUIKRETE pallet of 80 lb bags holds 42 bags. That is 25.2 cu ft, so a full yard is one pallet plus 3 bags. See how many bags are on a pallet.
- Other brands and products can yield differently, so check the bag.
Questions
How many 80 lb bags of Quikrete make a yard?
45 bags of QUIKRETE Concrete Mix, at about 0.60 cu ft each. Add your waste allowance on top.
How many 90 lb bags make a yard?
40 bags. The 90 lb size (0.675 cu ft) is sold only in some regions.
Related pages
Sources
QUIKRETE Concrete Mix yields; other products differ — check your bag.
Values marked with a link come from the linked source, which opens in a new tab. Unit conversions and our own defaults are listed separately. Every value the site uses is in the methodology source register.
Where the numbers come from 6
- 80 lb concrete bag yield
- 0.6 cu ft/bag
- QUIKRETE Concrete Mix No. 1101 data sheet (revised October 2022) (opens in a new tab)quikrete.com · PDF
- 60 lb concrete bag yield
- 0.45 cu ft/bag
- QUIKRETE Concrete Mix No. 1101 data sheet (revised October 2022) (opens in a new tab)quikrete.com · PDF
- 50 lb concrete bag yield
- 0.375 cu ft/bag
- QUIKRETE Concrete Mix No. 1101 data sheet (revised October 2022) (opens in a new tab)quikrete.com · PDF
- 40 lb concrete bag yield
- 0.3 cu ft/bag
- QUIKRETE Concrete Mix No. 1101 data sheet (revised October 2022) (opens in a new tab)quikrete.com · PDF
- 90 lb concrete bag yield
- 0.675 cu ft/bag
- QUIKRETE Concrete Mix No. 1101 data sheet (revised October 2022) (opens in a new tab)quikrete.com · PDF
- 80 lb Concrete Mix bags per pallet
- 42 bags/pallet
- QUIKRETE Concrete Mix retail page (Lowe's), product 1101: "42 per pallet (SKU #10385)" (opens in a new tab)quikrete.com
Unit conversions and our defaults3
- Cubic feet per cubic yard
- 27 cu ft/cu yd
- Geometry: 3 × 3 × 3 feet
- Inches per foot
- 12 in/ft
- Unit definition: one foot contains twelve inches
- Bag concrete waste default
- 10 %
- Owner planning default; editable
By Taimoor Zayad, DAE in Civil Engineering, three years as a site supervisor.Last updated How we calculate