Reorder Point Calculator for Ecommerce Inventory
Enter your daily sales, supplier lead time and safety stock to find the stock level at which you should reorder. Add your units on hand to see how many days of cover you have left.
Results
- Reorder point (units)
- 228
- Safety stock (units)
- 60
- Expected sales during lead time
- 168
- Days of cover on hand
- 33.3 days
You have 14.3 days before you hit the reorder point.
Frequently asked questions
How do you calculate a reorder point?
Multiply your average daily sales by your supplier lead time in days, then add safety stock. When your stock falls to that number, place a new order.
What is a good amount of safety stock?
It depends on how unpredictable your sales and supplier are. A common starting point is a few days of sales; for a statistical answer choose a service level and enter how much your daily sales vary.
What are days of cover?
Days of cover is your stock on hand divided by average daily sales. It tells you how long you can keep selling before you run out.
Do I round the reorder point up?
Yes. Round up to whole units so you never reorder a unit too late. The calculator does this for you.
Related tools
Sources and assumptions
Constant average sales and a fixed lead time.
Estimates for planning, not financial advice. Check current rates with your provider.