Concrete Bag Calculator
Find the exact number of 40, 50, 60, or 80 lb bags for your project - with pallet and cost planning.
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Pallet quantities vary by product and supplier. Choose a sourced example or enter the exact pack from your supplier.
Cost estimateOptional local price
How to Use
- Enter dimensions - length, width, and thickness of your pour area.
- Select thickness - use presets for common projects or enter a custom depth.
- Set waste - 10% covers most situations. Increase for uneven ground.
- Read bag counts - the calculator compares 80, 60, 50, and 40 lb bag counts.
- Plan pallets or cost - use a product-specific pallet pack or your supplier quantity, then compare local bag pricing with ready-mix.
One cubic yard (27 ft³) takes about 45 bags of 80 lb concrete, 60 bags of 60 lb, 72 bags of 50 lb, or 90 bags of 40 lb. Common mixed yields are 0.60, 0.45, 0.375, and 0.30 ft³ per bag respectively. Enter your dimensions above for an exact count.
Finishing the pour yourself?
A steel finishing trowel smooths the surface once the concrete is placed.
Finishing trowel on AmazonAs an Amazon Associate, CalcShed earns from qualifying purchases.How the Bag Count Is Measured
Concrete Bag Yield and Example Pallet Packs
Bag yield is tied to the product label. Pallet quantity is different: it is product- and SKU-specific, so bag weight alone does not tell you how many bags are on a pallet. These current manufacturer examples show why:
| Bag / product | Mixed yield | Bags per Cubic Yard | Example pallet pack |
|---|---|---|---|
| 80 lb - QUIKRETE 5000 | 0.60 ft³ | 45 bags | 42 bags/pallet |
| 60 lb - QUIKRETE 5000 | 0.45 ft³ | 60 bags | 56 bags/pallet |
| 80 lb - QUIKRETE Crack Resistant | 0.60 ft³ | 45 bags | 56 bags/pallet |
| 50 lb - QUIKRETE Concrete Mix | 0.375 ft³ | 72 bags | Verify exact SKU/supplier |
| 40 lb - QUIKRETE Concrete Mix | 0.30 ft³ | 90 bags | Verify exact SKU/supplier |
Use the pallet planner above with a sourced product preset or the exact bags-per-pallet quantity from your supplier. Do not assume one pallet count applies to every 40, 50, 60, or 80 lb concrete product.
When to Use Bags vs. Ready-Mix
Bagged concrete makes sense for small projects where you need precision and flexibility - fence posts, small pads, repairs, and any pour under about 1 cubic yard. You can mix at your own pace and don't need to coordinate delivery timing.
As volume approaches 1 to 2 cubic yards, compare the bag total with a current ready-mix delivery quote. Delivery minimums, short-load charges, local material prices, and access conditions vary, so there is no single nationwide break-even price.
Quick Reference: Bag Counts by Project
| Project | Size | Thickness | 80 lb Bags (base) | 80 lb Bags (+10%) |
|---|---|---|---|---|
| Fence post hole | 10" diameter × 36" deep | - | 3 bags | 3 bags |
| Mailbox post | 12" diameter × 24" deep | - | 3 bags | 3 bags |
| Small pad | 3 × 3 ft | 4" | 5 bags | 6 bags |
| Sidewalk section | 4 × 20 ft | 4" | 45 bags | 49 bags |
| Patio | 10 × 10 ft | 4" | 56 bags | 62 bags |
| Single-car driveway | 10 × 20 ft | 5" | 139 bags | 153 bags |
Base is the exact count (Volume ÷ 0.60); the +10% column adds a waste allowance - order that. Over ~90 bags, compare ready-mix.
Formulas Used in This Calculator
The calculator converts your dimensions to cubic feet, then divides by each bag's coverage:
With waste = Volume × (1 + Waste %)
80 lb bags = Volume (ft³) ÷ 0.60
60 lb bags = Volume (ft³) ÷ 0.45
50 lb bags = Volume (ft³) ÷ 0.375
40 lb bags = Volume (ft³) ÷ 0.30
Cubic yards = Volume (ft³) ÷ 27
Always round up to the next whole bag. Having one or two extra bags on hand is cheaper than making a second trip.
Spec & Standards Notes
- Packaged dry concrete mix - its composition, compressive-strength classes, and bag labeling - is governed by ASTM C387/C387M. Most general-purpose bagged mixes are rated around 4,000 PSI at 28 days.ASTM C387/C387M
- QUIKRETE Concrete Mix lists approximate mixed yields of 0.30 ft³ for 40 lb, 0.375 ft³ for 50 lb, 0.45 ft³ for 60 lb, and 0.60 ft³ for 80 lb bags. Use the actual product label when its stated yield differs.QUIKRETE Concrete Mix technical data
- Pallet quantities are packaging specifications, not universal bag-weight rules. QUIKRETE 5000 lists 56 of the 60 lb bags or 42 of the 80 lb bags per pallet.QUIKRETE 5000 packaging
- QUIKRETE Crack Resistant Concrete Mix lists 56 of its 80 lb bags per pallet, which is why an 80 lb bag weight alone cannot determine pallet quantity.QUIKRETE Crack Resistant packaging
Concrete Bag Cost Planning Examples
| Project | Base quantity (0% overage) | Cost calculation | Planning note |
|---|---|---|---|
| 10x10 ft patio (4 in) | 56x 80 lb bags | 56 × your local 80 lb bag price | Small-pour comparison |
| 12x12 ft patio (4 in) | 80x 80 lb bags | 80 × your local 80 lb bag price | Compare mixer time and handling |
| 20x20 ft garage slab (4 in) | 223x 80 lb bags | 223 × your local 80 lb bag price | Compare a current ready-mix quote |
| 8-in sonotube (2 ft deep) | 2x 80 lb bags | 2 × your local 80 lb bag price | Verify the actual product yield |
| 12-in sonotube (3 ft deep) | 4x 80 lb bags | 4 × your local 80 lb bag price | Verify the actual product yield |
Use the price-per-bag field above for a project-specific estimate. For larger pours, compare the bag total with a current local ready-mix quote that includes delivery and any short-load charges.
After You Know Your Bag Count
Bag count is one piece of the pour. Here is the usual sequence from here:
Comparing bag totals against a full installed price? See what a concrete slab actually costs in 2026 - per square foot, per cubic yard, broken down by size and region.
Related Calculators
Calculate the slab or footing volume first, then use this tool. Browse the construction calculator collection.