Free, in-browser. A periodic-review planning scenario — base demand plus statistical safety stock, with optional decay-rate adjustment for perishables. Nothing leaves your machine.
This calculator models an order-up-to target across a protection period:
Target = baseDemand + safetyStock + manualBuffer
Without loss, safety stock is z × σ × √T, where T is review interval plus lead time. With loss fraction d, the same recurrence weights daily uncertainty: safety stock = z × σ × √Σ(1 − d)^(−2k), for days k = 1 through T. Fractional-day inputs use the geometric extension of this model.
For non-perishables, baseDemand is just consumption rate × (review interval + lead time). For optional stock loss (decay rate d > 0), baseDemand integrates the exponential decay of inventory across the protection period:
baseDemand = (c/d) × ((1 − d)^(−T) − 1) where T = review interval + lead time; c = daily use; d = daily loss fraction
The gap to the modeled target is max(0, target − onHand − incoming + unfilled commitments), using incoming stock expected to arrive in time. The loss model applies loss before daily use. It does not establish food safety or guarantee availability.
=STDEV.S(...)).This tool is a standalone planning model. To evaluate connected inventory signals and supplier ordering in LineNow, review your own data and workflow. See pricing for the core plan, optional add-ons, and trial terms.