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Cubic Yards to Concrete Bags Calculator

Convert a required concrete volume into the number of 80 lb bags, for small pours below a delivery minimum.

Computed in your browser — nothing you enter is uploaded. Figures are presented for United States against IRC 2024, and every formula is cited under regulatory standards below.

Last verified 2026-08-26 · v1.0.0

Market
Imperial · sales tax

80 lb bags needed

45 bags

High confidence

27 cu ft per cubic yard ÷ 0.6 cu ft yield per 80 lb bag. Buy spares. A cold joint from running short is permanent; unused bags usually are not.

Conversion factor applied
45 bags per cu yd

Small pours below a supplier's delivery minimum have to be done from bags, and this converts the calculated volume into a shopping list. Around forty-five eighty-pound bags make a cubic yard. Two practical points matter more than the arithmetic. Buy more than the calculation says: running out partway through creates a cold joint where fresh concrete meets concrete that has already begun to set, and that plane stays weak for the life of the slab, whereas surplus unopened bags generally go back to the merchant. And be realistic about batching, because a yard is over a ton of material mixed a bag at a time while the first batches are already curing — the practical limit for one person is well below a full yard.

Estimated cost — your price

This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.

Preliminary estimate, not certified engineering. This tool produces an indicative quantity calculation for planning purposes only — it is not a certified structural analysis, a guaranteed material takeoff, or a substitute for building department approval. Always verify measurements on-site and have a licensed contractor or structural engineer review any load-bearing, code-sensitive, or safety-critical work before purchasing materials or starting construction. Spotted an arithmetic or standards error? Report it to contact@craftquantities.com with your inputs — confirmed fixes become pinned regression tests.

[Schema Verified] Computed in alignment with American Concrete Institute (ACI 318-19) formulas and International Residential Code (IRC 2024) spatial boundaries.

Regulatory standards & verification citations

  • 27 cu ft per cubic yard divided by approximately 0.6 cu ft yield per 80 lb bag
  • Typical result: about 45 bags of 80 lb mix per cubic yard

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Frequently asked questions

Should I buy a few spare bags?
Yes. Running out mid-pour creates a cold joint, which is a permanent weakness rather than a cosmetic flaw. Unopened bags can usually be returned; a compromised pour cannot be undone.
How many 60 lb bags instead?
Roughly sixty per cubic yard, since a 60 lb bag yields about 0.45 cubic feet. Lighter bags are easier to handle but there are more of them, and the price per yard is often higher.
Can one person pour a cubic yard from bags?
It is possible but demanding — around forty-five bags, over a ton of material, mixed in batches while the earlier batches are already setting. For anything approaching a yard, either bring help or arrange a delivery.