Calculator

Raw material order-by date and days of cover calculator.

Enter stock, in-transit quantity, planned daily use and lead time to see how many days of cover you have, how soon you must order and how much.

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Days of cover–
Order within–
Order quantity (kg)–

Runs in your browser; nothing is sent anywhere. Round the quantity to your supplier’s pack or truck size.

How it is calculated

Days of cover = (stock on hand + in transit) ÷ planned use per day. Order within = days of cover − supplier lead time − safety margin; at zero or below, order now. Order quantity = planned use per day × (lead time + safety margin + days the order should cover) − (stock on hand + in transit), never below zero. Count in-transit only if it arrives before stock runs out. Read raw material planning.

Questions

How do I calculate days of cover?

Stock on hand plus in-transit quantity, divided by planned use per day.

When should I place a raw material order?

When days of cover minus supplier lead time and a safety margin reaches zero. The calculator shows how many days you have left.

See it on your own data. Production & Procurement — Plan the line, buy on time. Book a 30-minute working session with an engineer.

General guidance, current as of the date above. Figures and examples are illustrative unless a source is linked.