Stockroom reads your sales history and suggests reorder points and order quantities for every product, so you do not have to guess. Here is where the suggestions live, how to review and apply them, and how the numbers are worked out.
Where suggestions appear
On the Inventory page, under the Suggested levels view - a review table of every product's suggested low, reorder, and max levels next to your own values. The Suggested levels button in the Reorder page's header takes you straight there.
As ghost values on each product's dashboard, until you set your own.
Behind the Reorder page - its list and Plan ahead horizon use suggestions as working thresholds when you have not set one.
Review and apply
On Inventory > Suggested levels, each row shows a suggested Low, Reorder point, and Max, a sales rate, and a status (Suggested, Partly set, Set, or Ignored). You can:
Search and filter (All, Needs values, Set, Ignored).
Click Apply on a row to save its suggestions.
Click Apply all suggestions to save them for every product that does not have its own values yet. Stockroom shows a count first, never changes values you have set, and skips ignored products.
Tick Replace values I've already set in that dialog to overwrite the numbers you have saved, instead of only filling empty fields. The count updates when you tick it, because the two modes cover different products. Ignored products are still skipped either way.
Applying only fills the fields you left empty, unless you choose to replace what you have set. Saving values also turns on stock alert coverage for those products - alerts read your saved numbers, not the suggestions.
Applied values are a snapshot: they stop following your sales once saved. Leaving a field empty is what keeps it tracking, because the suggestion is recalculated every night. If you want to hand a set of products back to the suggestions, empty their fields - on the product page, or in bulk by putting the word clear in those cells in the stock settings CSV.
See the math
Click the info icon on any row to see exactly how a suggestion was built, in plain language - for example "120 sold over 44 selling days = 2.73 a day," then how that becomes a reorder point (lead time plus a safety buffer) and a max level (reorder point plus a few more days of cover). Days a product was out of stock are excluded from the rate, so a stockout does not make it look like a slow seller. The flip side: a product that was in stock for only a few days of the window can look like a fast seller - 4 sold in the 2 days it was on the shelf counts as a brisk daily pace, not 4 a month - so a slow line that keeps selling out can carry a higher suggestion than its monthly total implies. The calculation says so ("out-of-stock days excluded"). If you know the real pace, set your own Max level on the product (Costs & replenishment) and suggestions top up to that instead.
How suggestions are calculated
The approach is deliberately simple and explainable:
Sales rate - how many you sell per selling day, over a recent window.
Reorder point - enough to cover your supplier's lead time, plus a safety buffer.
Max level - the reorder point plus extra days of cover, the level each order refills to.
Low stock - the safety buffer, so dipping into it is your early warning.
You set the defaults - lead time, safety buffer, order cover, and sales window - in Settings > Reorder suggestions. A supplier's own lead time and a product's own safety stock override those defaults. And when one order needs a different horizon, the cover dropdown in the PO editor recalculates that PO's suggested quantities for a 14, 30, 60, 90, 180, or 365-day cover without touching your defaults - see Creating and Sending Purchase Orders.
Why an order comes out at 1. The size of an order is the gap between the reorder point and the max level, and Order cover (days) is what opens that gap. Set it to a few days and a slow seller reorders a single unit at a time, which is correct arithmetic but rarely what you meant. Settings > Reorder suggestions works your own four numbers through two examples underneath the fields - an item selling 2 a day and one selling 1 a week - so you can see the order size your settings produce before you rely on them. One more cause worth knowing: adding products to a purchase order never sets a quantity for you, so a big add lands as a page of 1s. Add ten or more lines at once and Stockroom offers Fill suggested quantities, which is the control that fills them from your levels and stock on hand.
Getting started with suggestions
Suggestions need sales history. When you install, Stockroom automatically reads up to 2 years of past orders, so suggestions usually appear within a few minutes. Each product needs about 14 days of history before it gets a suggestion; until then you can set levels yourself. If the Reorder page says it is still analyzing, waiting on order access, or has no history yet, it will start working on its own as the data lands.
For an overview of reordering and forecasting, see Forecasting & reordering on stockroom.app.