What is stock runway?
Stock runway is the estimated number of days a product’s current stock will last at its recent rate of sale. It turns a raw inventory count into a forward-looking figure: not “how many units are left” but “how long they will last if demand holds”.
How is stock runway calculated?
Current available inventory is divided by the product’s recent daily sell-through rate. Because the sell-through rate is taken from live demand, the runway shortens automatically as a product speeds up and lengthens as it slows — it reflects the pace of demand, not just a static stock number.
Why is stock runway more useful than a stock count?
Two products with the same units left can be in very different positions: one selling steadily has weeks of runway, another accelerating has days. The runway captures that difference. A short runway is flagged most urgently and a longer one left alone, so attention goes to the products genuinely close to running out.
How does stock runway relate to scarcity risk?
Runway is the time input; scarcity risk is the judgement built on top of it. A short runway becomes a scarcity risk when it is paired with strong, live demand — and the combination of a short runway and accelerating demand is the single highest-urgency signal for restocking.
See stock runway in the platform
The demand intelligence layer estimates how long each product's stock will last at its live rate of sale.