FBA STR Formula:
From: | To: |
The FBA (Fulfillment by Amazon) Sell-Through Rate (STR) measures how quickly your inventory sells compared to how much you have in storage. It's a key metric for Amazon sellers to evaluate inventory performance and sales velocity.
The calculator uses the FBA STR formula:
Where:
Explanation: The ratio shows how many times your inventory turns over in a 30-day period. Higher values indicate faster selling products.
Details: STR helps sellers identify fast-moving products, avoid storage fees for slow-moving inventory, and optimize restocking decisions. Amazon also uses STR to evaluate seller performance.
Tips: Enter the total units sold in the past 30 days and your average inventory level during that period. Both values must be positive numbers.
Q1: What is a good FBA STR?
A: Generally, STR > 1 is good (selling more than your average inventory), while STR < 0.5 may indicate slow-moving inventory.
Q2: How often should I check my STR?
A: Monthly monitoring is recommended, especially before making restocking decisions.
Q3: Does STR affect storage fees?
A: Indirectly - products with low STR may incur long-term storage fees if they don't sell.
Q4: Should I consider seasonality in STR?
A: Yes, STR naturally fluctuates with seasonal demand patterns.
Q5: How can I improve my STR?
A: Strategies include pricing adjustments, promotions, improving listings, or reducing inventory levels for slow movers.