Inventory Reorder Point Calculator

A reorder point calculator for small retail shops — know exactly when to reorder each product. Use the free Inventory Reorder Point Calculator below — enter your values and get instant results, right in your browser. Reorder point = Daily sales × Lead time in days. With safety stock = Daily sales × (Lead time + 3). Order when on-hand stock reaches the reorder point so new stock arrives just as you sell out.

How to use the Inventory Reorder Point Calculator

Stockouts lose customers; overstocking locks cash in the godown. The reorder point — the stock level that triggers a new order — balances both. This reorder point calculator for small retail shops builds a table from your product's average daily sales: find your supplier's lead-time row and read the exact unit count at which to reorder, with and without a 3-day safety buffer.

  1. Enter the product's average daily sales in units (check last month's khata).
  2. Set rows to cover your longest supplier lead time in days.
  3. Click Generate to build the reorder-point table.
  4. Find your supplier's lead-time row — when stock hits that number, place the order immediately.

Formula

Reorder point = Daily sales × Lead time in days. With safety stock = Daily sales × (Lead time + 3). Order when on-hand stock reaches the reorder point so new stock arrives just as you sell out.

Worked example

Cooking oil sells 10 packs/day; the supplier takes 7 days. Reorder point = 10 × 7 = 70 packs; with safety stock = 10 × 10 = 100 packs. When the shelf count hits 70–100, the owner orders — never stocking out, never over-ordering.

Frequently asked questions

Safety stock is extra buffer for late deliveries or demand spikes. Keep 2–5 days' worth for critical fast-movers; slow items can run leaner.

Divide last month's units sold by 30. For seasonal items (e.g. winter stock), use the same season last year, not the yearly average.

At minimum, set reorder points for your top 20% fastest-moving items — they drive most revenue. Slow movers can be reordered on simple visual checks.

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