Sell-Through Rate — Smart Financial Analysis
Calculate the percentage of inventory sold, days of supply, and revenue impact. STR = Units Sold / Beginning Inventory × 100.
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The percentage of inventory sold during a period. STR measures what percentage sold. Overordering, poor demand forecasting, wrong product mix, high pricing, seasonal misalignment, or weak marketing. Low STR ties up cash in unsold inventory.
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Why: The percentage of inventory sold during a period. STR = Units Sold / Beginning Inventory × 100. A 75% STR means 75 of every 100 units received were sold. Higher is generally bet...
How: Enter Units Sold, Beginning Inventory, Ending Inventory to get instant results. Try the preset examples to see how different scenarios affect the outcome, then adjust to match your situation.
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📋 Quick Examples — Click to Load
📊 Performance Bar
Units sold, remaining inventory, and value tied up
🍩 Sold vs Unsold
Inventory composition
📊 STR by Category
Industry benchmarks vs your STR
📈 Revenue at STR Levels
Revenue potential at different sell-through rates
For educational purposes only — not financial advice. Consult a qualified advisor before making decisions.
💡 Money Facts
Sell-Through Rate analysis is used by millions of people worldwide to make better financial decisions.
— Industry Data
Financial literacy can increase household wealth by up to 25% over a lifetime.
— NBER Research
The average American makes 35,000 financial decisions per year—many can be optimized with calculators.
— Cornell University
Globally, only 33% of adults are financially literate, making tools like this essential.
— S&P Global
Sell-through rate is the heartbeat metric of retail operations, revealing how quickly inventory converts to revenue. In the $5+ trillion US retail industry, efficient inventory management separates profitable retailers from those drowning in markdowns. Companies like Zara achieve 85%+ sell-through by combining fast fashion with tight inventory control.
Sources: National Retail Federation, Retail Industry Leaders Association, McKinsey, IHL Group.
Key Takeaways
- • STR = Units Sold / Beginning Inventory × 100
- • Days of Supply = Ending Inventory ÷ (Units Sold ÷ Days in Period)
- • Higher STR = faster cash conversion and less markdown risk
- • Benchmark by category: fast fashion 80%+, luxury 30-50%
Did You Know?
How Does Sell-Through Rate Work?
Primary Formula
STR = Units Sold ÷ Beginning Inventory × 100. Example: 800 sold of 1,000 received = 80% STR.
Alternative (Ending Inventory)
STR = Units Sold ÷ (Units Sold + Ending Inventory) × 100 when beginning inventory is unknown.
Days of Supply
Days of Supply = Current Inventory ÷ Daily Sales Rate. Estimates how long stock will last at current velocity.
Expert Tips
STR Benchmarks by Category
| Category | Target STR | Notes |
|---|---|---|
| Fast Fashion | 80-90% | Short lifecycles |
| Electronics | 60-80% | Obsolescence risk |
| Grocery (Perishables) | 90%+ | Waste minimization |
| Luxury | 30-50% | Exclusivity |
| General Retail | 40-60% | Mixed assortment |
Frequently Asked Questions
What is sell-through rate?
The percentage of inventory sold during a period. STR = Units Sold / Beginning Inventory × 100. A 75% STR means 75 of every 100 units received were sold. Higher is generally better.
What is a good sell-through rate?
Fast fashion: 80-90%. Electronics: 60-80%. Grocery (perishables): 90%+. General retail: 40-60%. Luxury: 30-50%. The benchmark varies significantly by product category and seasonality.
How does STR relate to inventory turnover?
STR measures what percentage sold. Turnover measures how many times inventory cycles. A store with 80% STR monthly and replenishment has ~10x annual turnover. Both measure inventory efficiency.
What causes low sell-through?
Overordering, poor demand forecasting, wrong product mix, high pricing, seasonal misalignment, or weak marketing. Solutions: markdowns, promotions, better planning, return to vendor.
How does sell-through affect cash flow?
Low STR ties up cash in unsold inventory. A $1M inventory with 50% STR has $500K sitting idle. Improving STR from 50% to 75% frees $250K in working capital.
What is days of supply?
Days of Supply = Current Inventory / Daily Sales Rate. It estimates how long current stock will last. 30 days is typical retail target. Below 7 = risk of stockouts. Above 90 = excess inventory.
Key Statistics
Official Data Sources
⚠️ Disclaimer: This calculator is for educational purposes only. Benchmarks vary by category, season, and geography. Not financial or operational advice. Consult professionals for inventory and retail strategy decisions.
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