Safety Stock & Reorder Point Calculator
Stop guessing how much extra stock to keep on hand. Enter your numbers — get the exact buffer and reorder trigger in seconds.
= 1.65 × (0.30 × 20) × √7
= 27 units
= (20 × 7) + 27
= 167 units
How it works
Safety stock is the extra inventory you keep on hand so you don't run out when demand spikes or your supplier is late. Without it, you stock out and lose sales. With too much of it, your cash sits dead on a shelf.
Reorder point is the number that says "place your next order NOW." It's calculated so that when your new shipment arrives, you'll still have just enough left to cover any surprises during the lead time.
Worked example — phone case shop
- You sell phone cases:20/day
- Supplier takes:7 days
- You want to be in stock:95% of the time
- Sales jump around like a normal small business:~30% variability
- Safety stock buffer:27 cases
- Reorder when stock drops to:167 cases
Want this for every product, automatically?
InventoryQuick tracks reorder triggers and stockout risks across your entire inventory in real time, then alerts you the moment any item needs reordering. Track tools, equipment, and supplies in one app — from $19/mo flat, no per-user fees.
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