how many days of stock have you got left?
Enter what's on the shelf and how fast it sells. See the days you have left, the day you run out, and the day to reorder by.
Days of stock left = units in stock ÷ units sold per day. 300 units at 10 a day is 30 days. Reorder before that drops below your supplier lead time.
Your numbers
Stock runway
track this for every product
EZstock works out days of stock left for every product from its real sales speed, and sorts your dashboard by what runs out first. Free plan, no card needed.
how the math works
Days of stock left is your current stock divided by how fast it sells. The reorder date works back from that using your supplier's lead time, so the restock lands before you run dry.
on hand
How many units you have right now. Use the real on-hand count, not what's on order.
sell rate
Units sold on an average day. A recent 30-day average is the honest number if sales bounce around.
lead time
How long your supplier takes to deliver. This is what sets your reorder-by date, not the stockout date.
why the reorder date matters more
Knowing when you run out is only half of it. If your supplier takes two weeks and you wait until you're nearly empty to order, you still sell out while you wait for the delivery. The reorder-by date is the one to act on.
order early
Place the order while days-left is still above your lead time, so stock arrives before zero.
faster sellers, sooner
A product selling 40 a day needs ordering far earlier than one selling 4, even with the same stock.
buffer for spikes
Sales speed up. Leave a few days of safety stock so a busy week doesn't catch you short.
questions
how do you calculate days of stock left?+
Divide units in stock by units sold per day. 300 units at 10 a day is 30 days of stock. This tool does that and projects the stockout date from today.
when should i reorder?+
Before your days of stock left drops below your supplier lead time. Reorder-by date is the stockout date minus the lead time, so the new stock arrives before you sell out.
what sell rate should i use?+
Use the product's recent average daily sales. If sales vary, average over a normal 30-day stretch rather than a single spike or a slow day.
how do i track this automatically?+
EZstock works out days of stock left for every product from its real sales velocity and sorts your dashboard by urgency, so you reorder the right things first. Coming from Stocky? You can bring your data over.