Concrete planning guide
Concrete Bag Yields: 40, 60, and 80 lb
Understand concrete bag yields in cubic feet and how many bags make a cubic yard. Not all bags are the same yield — always check the bag before ordering.
Published 2026-07-16 · Updated 2026-07-16 · BuildMeasure Editorial Team
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Use the Concrete Volume CalculatorBag weight is not the same as yield
A 40-pound bag of concrete does not make 40 pounds of concrete; it is a dry mix that yields a smaller volume of hardened concrete when water is added. The yield depends on the bag weight and the product formulation.
Manufacturers print the yield in cubic feet on every bag. Common yields for US bags are 0.30 cu ft (40 lb), 0.45 cu ft (60 lb), and 0.60 cu ft (80 lb). Always read the bag — not every 60 lb bag yields 0.45 cu ft. Some fast-set or specialty mixes have different yields.
Convert your volume to cubic yards, then to bags
A cubic yard is 27 cubic feet. To find how many bags you need, divide the volume in cubic feet by the yield per bag.
For a volume measured in inches, convert to cubic feet first by dividing by 1,728 (12 × 12 × 12). Then divide by the yield per bag.
| Bag weight | Yield per bag | Bags per cubic yard |
|---|---|---|
| 40 lb | 0.30 cu ft | 90 bags |
| 60 lb | 0.45 cu ft | 60 bags |
| 80 lb | 0.60 cu ft | 45 bags |
These are approximate. Exact yields vary by product. Always confirm the yield printed on the specific bag you buy.
Choose bag size based on the project volume
A 40 lb bag is lighter to carry and mixes in smaller batches. Use it for very small repairs, art projects, or thin sections where waste is an issue.
A 60 lb bag is the standard for small projects. It fits a typical wheelbarrow and mixer and balances ease of handling with reasonable batch size.
An 80 lb bag is heavier and yields more per bag, reducing the total bag count for larger jobs. It is standard for commercial and industrial work.
For any project, round up the bag count. Leftover concrete stays workable longer than unordered shortfall.
Remember: always read the bag
Specialty formulations — quick-set, fiber-reinforced, or colored concrete — may have different yields than standard bags of the same weight. Confirm the yield printed on the product before you calculate bag count. One manufacturer's 60 lb bag may not match another's if the formulation differs.
- Calculate the volume you need in cubic feet.
- Read the yield printed on the bag.
- Divide volume (cu ft) by yield (cu ft per bag) to find the bag count.
- Round up to the nearest whole bag.
- For hand-mixing or small batches, consider the practical batch size from one bag.
- Check whether the store has the bag size in stock and in the specific product you chose.
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Related measurement guides
Sources and limits
Check the project-specific details
- Quikrete product data — Manufacturer yield specifications for standard concrete bags; yields vary by product line.
- NIST unit conversion — Reference for cubic foot and cubic yard definitions.
Review status: Formulas and conversions covered by automated tests; measurement practice pending human trade review.
This guide supports planning only. It does not specify structural design, code compliance, or a supplier quotation.