Reorder Point Calculator
The reorder point is the stock level at which you must place the next purchase order to avoid running out while the supplier delivers. It combines demand during lead time with a safety buffer for the weeks when sales spike or the shipment is late.
Upgrade to Pro to use Reorder Point Calculator
This tool is included on the Pro plan. You can preview the interface below and explore the free tools directory in the meantime.
Who should use Reorder Point Calculator
- Sellers managing SKUs with supplier lead times of a week or more
- Shops importing stock where transit variability is high
- Anyone who has lost marketplace rank to an out-of-stock listing
How to use it, step by step
- Enter average daily units sold over a representative recent window.
- Enter supplier lead time in days, measured door to door including inspection.
- Enter safety stock in days, sized by how volatile your demand and lead time are.
- Reorder whenever on-hand stock plus stock already in transit falls to the calculated point.
Reorder point and safety stock
Demand during lead time is the base requirement. Safety stock covers the difference between average and bad weeks. Longer or less reliable lead times require disproportionately more buffer.
Lead time demand = Average daily sales x Lead time days Safety stock = Average daily sales x Safety days Reorder point = Lead time demand + Safety stock
Worked example: 40 units a day, 18-day lead time
- Lead time demand = 40 x 18 = 720 units
- Safety stock at 7 days = 40 x 7 = 280 units
- Reorder point = 1,000 units
Place the order the moment available stock hits 1,000, not when the shelf looks empty. If lead time slips to 25 days, the reorder point rises to 1,280 — recalculate whenever your supplier's performance changes.
Common mistakes to avoid
- Using a monthly average that hides a festive spike or a weekend pattern.
- Measuring lead time from dispatch instead of from PO placement to sellable stock.
- Forgetting stock already in transit and double-ordering.
- Applying identical safety days to a stable staple and a volatile trend SKU.
How to read the result
Review the reorder point monthly and after every late shipment. For high-margin SKUs a stockout costs more than the carrying cost of extra buffer, so bias upward; for low-margin bulky SKUs the reverse is usually true.
Frequently asked questions
How much safety stock is right?
Start at roughly a third of lead time for stable demand and increase where either demand or supplier reliability varies widely.
Does this work for seasonal SKUs?
Use the daily rate you expect during the coming period, not the trailing average, or you will under-order into a season.
What it does
Compute reorder point from lead time, daily sales and safety stock cover.
Who it's for
- • Amazon, Flipkart, Meesho, Myntra and Nykaa sellers
- • D2C brands running Shopify or WooCommerce
- • Indian small business owners who want practical, no-fluff tools
Frequently asked
Who is Reorder Point Calculator for?
Reorder Point Calculator is built for Indian ecommerce sellers and small business owners who want when to place your next po.
Do I need to connect an API?
No. It runs locally in your browser.
Which plan includes this tool?
Reorder Point Calculator is included on the Pro plan and above.
Is my data safe?
Yes. Calculators and generators run in your browser. Nothing is uploaded unless you sign in and connect a data source.
Related tools
Automate Reorder Point Calculator on the Pro or Business plan
AIFlowBiz turns one-off tool runs into scheduled workflows — daily reports, restock alerts, review replies, price watches and full team approvals. Pro gets limited automation; Business unlocks bulk runs and marketplace, shipping and WhatsApp API connections.