What Case Pack Quantity Means for Amazon FBA
Case pack quantity is the number of identical sellable units packaged inside a single master carton that you ship to Amazon FBA, AWD, or a 3PL. The three terms multi-pack, case pack quantity, and pallet quantity describe nested levels of packaging, and FBA sellers need to manage all three on every reorder.
A multi-pack is a single sellable ASIN that contains multiple individual items, such as a 4-pack of toothbrushes sold under one barcode. Case pack quantity is how many of those sellable multi-packs fit into one master shipping carton (commonly 12, 24, 48, or 96). Pallet quantity is the total number of cases stacked on a 48 by 40 inch GMA pallet for LTL or FTL freight to an FBA fulfillment center.
Case Pack Quantity Math and Limits
FBA imposes hard physical limits at the case level. Each box must weigh under 50 lb (100 lb for a single oversize item) and fit within Amazon's small parcel dimension limits. Pallets cannot exceed 72 inches in total height (pallet plus contents) and 1,500 lb in total weight for standard grade.
For a typical case measuring 12 x 12 x 8 inches, a standard pallet holds about 13 layers of 13 cases = 169 cases. At a case pack quantity of 24, that pallet contains 4,056 sellable units.
Worked Example: Reordering a 24 Unit Case Pack
You sell a $24.99 silicone kitchen tool. Weekly velocity is 220 units. Lead time from your manufacturer in Vietnam is 65 days. Your case pack quantity is 24.
| Reorder Variable | Calculation | Value |
|---|---|---|
| Lead time demand | 220 × (65 / 7) | 2,043 units |
| Safety stock (2 weeks) | 220 × 2 | 440 units |
| Reorder need (raw) | 2,043 + 440 − on hand 600 | 1,883 units |
| Round up to case pack | ceil(1,883 / 24) × 24 | 1,896 units |
| Cases ordered | 1,896 / 24 | 79 cases |
| Pallets shipped | 79 / 169 cases per pallet | 0.47 (1 pallet partial) |
Rounding to the case pack quantity adds 13 extra units, which is roughly half a week of cover at this velocity. Acceptable. Now compare the same calculation with a 48 unit case pack: ceil(1,883 / 48) × 48 = 1,920 units, 24 extra units, still fine. A 96 unit case pack pushes you to 1,920 with 37 extra units (half a week).
FBA Cost Impact of Case Pack Quantity
Case pack quantity directly affects your FBA inbound costs. Smaller cases mean more total cases per shipment, which costs more in 3PL palletizing labor and increases the chance Amazon flags your shipment for unplanned services like overweight box repacking ($0.40 per unit) or oversized box correction ($0.20 per unit). Larger cases are cheaper per unit to prep but expose you to bigger reorder rounding.
The right case pack quantity is dictated by velocity and restock limits. A high-velocity ASIN moving 1,000 units per week can absorb a 96 case pack with no stranded inventory. A low-velocity ASIN moving 30 units per week needs 6 or 12 unit case packs to avoid sitting on partial cases for months. Refer to Amazon Seller Central for the latest packaging requirements.
Common Mistakes with Case Pack Quantity
Forcing one case pack quantity across all SKUs. A 48 unit case pack works for fast movers but creates stranded partial cases on slow movers. Set case pack quantity per SKU based on weekly velocity divided by 6 (so each case represents about a week of cover for that ASIN).
Ignoring the 50 pound box limit. Heavy items like cast iron pans hit the limit at 8 to 12 units per case. Sellers who default to 24 unit case packs on heavy SKUs trigger reweigh and repack fees on every shipment.
Mixing case pack quantity with multi-pack count. A "24 pack" listing can refer to a sellable 24-count multi-pack, or a master case of 24 sellable singles, depending on context. Always specify both numbers in your purchase orders to your manufacturer to avoid receiving the wrong quantity.
Related Glossary Terms
Frequently Asked Questions
What is the difference between case pack quantity and multi-pack?
Multi-pack is a sellable retail unit (e.g., a 4-pack of socks sold as one ASIN). Case pack quantity is how many of those sellable units fit into one shipping carton bound for Amazon.
Does Amazon FBA require a specific case pack quantity?
Yes. Each box must weigh under 50 lb (or 100 lb for single oversized items) and stay within Amazon's dimension limits. Case pack contents must match the inbound shipment plan exactly.
How many units fit on a pallet for FBA?
A standard 48 by 40 inch GMA pallet holds roughly 1,000 to 2,500 small units depending on case dimensions. Pallet height cannot exceed 72 inches including the pallet itself.
Should I increase my case pack quantity?
Higher case pack quantity reduces per-unit freight cost but increases minimum order risk. A 24 unit case pack works for items selling 50 to 200 units per week. Slow movers should use 6 or 12 unit case packs to avoid stranded partial cases.