#1099 · E-commerce Tool

Physical Product Reorder Calculator

Calculate reorder point, days until stockout, and suggested reorder quantity for physical products. Use it to prevent stockouts while avoiding excess inventory.

Calculator

Physical product metrics
units
units/day
days
units
units
%
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How to use this calculator

  • Enter the product, traffic, cost, inventory, or order values requested by the tool.
  • Click Calculate to see the main result, health score, status, and recommendation.
  • Use the related calculators to compare price, margin, inventory, AOV, conversion, and discount decisions.

What the result means

Reorder timing compares current stock coverage with supplier lead time and safety stock. It helps decide when and how much to order.

Reorder Point = Adjusted Daily Sales × Supplier Lead Time + Safety Stock. Days Until Stockout = Current Inventory ÷ Adjusted Daily Sales.

Benchmarks vary by product category, channel, fulfillment model, and customer segment. Use the result as a decision estimate, not accounting advice.

Example calculation

With 900 units, 25 daily sales, 10% growth, and a 14-day lead time, stock lasts about 33 days and reorder point is about 535 units.

Tips for better results

  • Review reorder points monthly.
  • Increase safety stock before seasonal peaks.
  • Track supplier lead time variance.
  • Use MOQ carefully to avoid overstock.
  • Reorder earlier for high-velocity SKUs.

FAQ

When should I reorder inventory?

Reorder when available inventory approaches the reorder point, which is demand during lead time plus safety stock.

How much safety stock should I keep?

Safety stock should cover demand spikes, supplier delays, and seasonality without creating excessive storage cost.

What is the economic order quantity formula?

EOQ estimates an order quantity that balances ordering cost and holding cost, though this simplified tool focuses on reorder timing.

How do I avoid inventory stockouts?

Monitor daily sales, supplier lead time, safety stock, and demand growth, then reorder before stock reaches the reorder point.

How many inventory days should an online store maintain?

Many stores maintain 30–60 days of inventory, adjusted for cash flow, supplier reliability, and sales velocity.

Decision metrics

MetricMeaning
Main ResultPrimary number used for decision-making.
Health Score0–100 score based on profitability, operating efficiency, or risk.
StatusExcellent, Good, Average, or Needs Improvement.
RecommendationAutomatic next action based on the result.

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