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Amazon Reorder Point Calculator

Estimate when a SKU should be reordered using recent sales velocity, supplier lead time, a safety-stock buffer and your current sellable inventory.

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Reorder point

Inventory reorder point

Use recent unit velocity plus supplier lead time and a safety buffer to estimate when a SKU should be reordered.

Average units sold / daySupplier lead time (days)Safety stock buffer (days)Current sellable stock (units)Order-cycle coverage (days)

Live scenario

Reorder point

352 units

Current days of cover: 37.5 days
Days until reorder threshold: Reorder now
Target stock after replenishment: 592
Suggested order now: 292

Simple deterministic model. Seasonality, inbound receiving delays, MOQ, case packs, reserved stock and marketplace restock limits are not included.

Shareable result

352 unitsReorder point

37.5 days of cover with a suggested order of 292 units. Sharing includes only the displayed result label and value; raw calculator inputs and local detail are not added to the shared URL or analytics event payload.

See paid workflows

What this calculator answers

At roughly what stock level should this SKU trigger a reorder?

How many days of inventory cover remain at the entered sales velocity?

How many units would restore lead-time, safety and order-cycle coverage in this simple model?

From calculator to recurring workflow

Stop rebuilding the same spreadsheet every week.

The free tool is for one scenario. Solarc Labs paid workflows are for repeated analysis, saved evidence, team handoff and automation.

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Independent tool: Solarc Labs is not affiliated with or endorsed by Amazon, Shopify or WooCommerce. Brand names are used only to describe common seller workflows. Outputs are planning estimates based on the figures you enter and are not tax, customs, accounting, advertising or marketplace-fee advice.