Reorder Point & EOQ Calculator
Find the economic order quantity that minimises ordering plus holding cost, and the reorder point that covers demand during the lead time. Calculates in your browser.
Economic order quantity
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Show the math
EOQ balances ordering against holding cost; reorder point covers usage during the lead time:
EOQ = √(2 × demand × order cost ÷ holding cost)
reorder point = daily usage × lead time + safety stock
EOQ assumes steady demand and a fixed order cost, treat it as a starting point, not a hard rule. All math runs in your browser.
What this does
A reorder point and EOQ calculator finds the economic order quantity that minimises ordering plus holding cost, and the reorder point that covers demand during the lead time.
How to use it
- Enter annual demand and order cost.
- Enter holding cost per unit.
- Enter daily usage and lead time.
- Read the EOQ and reorder point.
How it works
The reorder point is daily usage × lead time plus safety stock to cover variability.
EOQ = √(2 × demand × order cost ÷ holding cost)
Understanding your result
The EOQ is the order size that balances ordering cost against holding cost, so both larger and smaller orders cost you more overall. The reorder point is the stock level that triggers a new order in time to cover demand through the lead time, plus a safety buffer for variability.
Example
Reorder when stock hits the lead-time demand plus your safety buffer.
Sources & methodology
Last updated .
Frequently asked questions
What is economic order quantity?
EOQ is the order size that minimises total ordering and holding cost: the square root of (2 times annual demand times order cost, divided by holding cost per unit).
How is the reorder point set?
Multiply daily usage by the lead time in days, then add safety stock to cover variability.
Is my data stored?
No. Everything is calculated locally in your browser.
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