Bagged Concrete Estimator

Concrete Bag Calculator

Estimate how many bags of concrete to buy from a known volume or quick project dimensions. Compare bag sizes, waste, and material cost before you head to the store.

Bag Count
Rounds up to whole bags after adding waste.
Bag Sizes
Supports common 40/60/80 lb and metric bags.
Cost
Multiplies bag count by your local bag price.

Estimate Concrete Bags

Results

Concrete Volume

1.1 yd³

29.7 ft³ / 0.841 m³

Bags Needed

50 bags

Rounded up to whole bags

Estimated Cost

$250.00

Based on bag price

Waste Factor

10%

Included in total volume

Bag Size Comparison

BagYieldBest for
40 lb0.3 ft3Small repairs, easier lifting
60 lb0.45 ft3Balanced weight and bag count
80 lb0.6 ft3Fewer bags, heavier handling

Example Bag Counts

1 cubic yard

Common ready-mix comparison point.

Result: 50 bags / 1.1 yd3 / $250.00

10 ft x 10 ft x 4 in slab

Small pad using 80 lb bags.

Result: 62 bags / 1.358 yd3 / $310.00

0.5 cubic yard

Small project volume with waste.

Result: 25 bags / 0.55 yd3 / $125.00

Buying Tips

  • Check the exact yield printed on the bag you plan to buy.
  • Buy a little extra if returning unused bags is easy.
  • Use one product type for the full pour to avoid color shifts.
  • Plan mixing capacity before buying dozens of bags.

Bags vs Ready-Mix

Bagged concrete is convenient for small pours, repairs, posts, and projects where delivery is impractical. For larger volumes, compare your bag count, mixing labor, and total material cost against local ready-mix minimums and delivery fees.

Frequently Asked Questions

How many 80 lb bags are in a cubic yard of concrete?
An 80 lb bag commonly yields about 0.6 cubic feet. One cubic yard is 27 cubic feet, so one cubic yard takes about 45 bags before waste. With 10% waste, plan for about 50 bags.
How many 60 lb bags are in a cubic yard?
A 60 lb bag commonly yields about 0.45 cubic feet. One cubic yard takes about 60 bags before waste, or about 66 bags with 10% waste.
Should I buy 40 lb, 60 lb, or 80 lb bags?
80 lb bags usually need fewer bags and cost less per cubic foot, but they are heavy. 60 lb bags are a practical middle ground. 40 lb bags are easier to carry for small repairs but usually require more total bags.
When should I order ready-mix instead of bags?
For very small jobs, bags are convenient. Around 1 cubic yard or more, bagged concrete can become labor-heavy because you may need dozens of bags. For 2-3+ cubic yards, ready-mix is often easier and more consistent.
Does this calculator include waste?
Yes. The waste factor is added before the bag count is rounded up. A 10% waste factor is a useful default for many DIY pours, but irregular forms or uneven bases may need more.

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