Tool · Stockout Prevention

Days of Inventory Remaining Calculator

Predict when each SKU will run out of stock based on current inventory and average daily sales velocity.

Days of Inventory Remaining Formula
Days Remaining = Current Stock ÷ Avg Daily Sales

Current Stock = Units currently on hand for the SKU

Avg Daily Sales = Average number of units sold per day

SKU NameCurrent StockAvg Daily Sales

Understanding urgency levels

  • Critical (< 7 days) — Stockout is imminent. Place an emergency order immediately or risk lost sales.
  • Warning (7–14 days) — Running low. Order now to ensure stock arrives before you run out, accounting for lead time.
  • Low (14–30 days) — Approaching reorder point. Start planning your next purchase order.
  • OK (> 30 days) — Healthy stock levels. No immediate action needed.
Multi-channel inventory

Stop running these numbers by hand.

You just calculated this for a handful of SKUs. Organizely does it across your entire catalog, updates every time an order comes in, and tells you exactly when to act.

  • Automatically tracks every SKU across all your channels
  • AI demand forecasting predicts stockouts before they happen
  • Smart reorder alerts so you never miss a purchase order
  • Real-time sync — no CSV exports or manual data entry
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Tool guide · Why use it

What this tool helps you do

  • Predict stockout dates for every SKU
  • Identify critical low-stock items instantly
  • Prioritize reordering with urgency badges
  • Analyze multiple SKUs simultaneously
  • Export stockout predictions as CSV
FAQ · 05 entries

Frequently asked questions.

01How are days of inventory remaining calculated?

Days of inventory remaining is calculated by dividing your current stock by the average daily sales rate. For example, if you have 300 units and sell 10 per day, you have 30 days of inventory remaining.

02What do the urgency levels mean?

Critical (red) means less than 7 days of stock remain and you should reorder immediately. Warning (yellow) is 7-14 days. Low (blue) is 14-30 days. OK (green) means you have more than 30 days of inventory.

03How is the projected stockout date determined?

The stockout date is calculated by adding the days of inventory remaining to today's date. It assumes a constant daily sales rate. Actual stockout may differ if demand fluctuates seasonally or due to promotions.

04What if a SKU has zero daily sales?

If average daily sales is zero, the calculator shows infinite days remaining since the item is not being sold. This could indicate dead stock that may need to be discounted or liquidated.

05How should I use this data to plan reorders?

Focus on SKUs in the Critical and Warning zones first. Cross-reference the projected stockout date with your supplier lead time: if lead time is longer than days remaining, you need to order immediately to avoid a stockout.