OH

On Hand (OH) refers to the real-time count of units Amazon has physically received and stored for a given ASIN across its fulfillment network. This inventory is considered available for sale, though some portions may be reserved for pending orders, transfers, or processing.

OH Inventory may include:

• Sellable inventory - ready to fulfill customer orders
• Reserved inventory - set aside for orders, FC transfers, or quality checks
• Inbound received inventory - scanned in and ready for pick/pack
• Excludes in-transit or unavailable/damaged stock

Where sellers see OH:

• FBA Dashboard in Seller Central
• Inventory Health Reports
• Restock Recommendations
• Vendor Central replenishment planning

Why OH matters:

• Helps monitor stock levels and avoid out-of-stock (OOS) scenarios
• Affects Buy Box eligibility and ad performance
• Guides reordering decisions and demand forecasting
• Influences Inventory Performance Index (IPI) for FBA sellers

💡 Example: A seller checks their FBA dashboard and sees 342 units OH for their top-selling ASIN - with 40 units reserved and 20 inbound.

In short:
OH (On Hand) is the total quantity of inventory currently stored in Amazon’s fulfillment centers - crucial for managing stock levels, sales velocity, and replenishment strategy.