How is this different from a reorder point?

A reorder point triggers on stock level; a supermarket size refills on a fixed route schedule with a set quantity. Use this page when the route drives replenishment, and a reorder point when the level does.

Should safety stock sit in the supermarket or upstream?

In the supermarket, because that is where downstream picks it. Keeping it upstream only adds retrieval time and hides the buffer from the material handler who refills it.

What if the loop runs less often than every hour?

Enter loop time in hours anyway, converting minutes to a fraction of an hour, such as a 90-minute route as 1.5. The page keeps one time basis so the quantity stays in units.

Why not round the quantity up to a full pallet?

Round only after the model, because pallet rounding changes the floor space and the handling. Recalculate the coverage the rounded quantity buys and accept it deliberately.

Lean Manufacturing & Operations calculator

Supermarket Replenishment Quantity Calculator

Size the quantity a material handler brings to a supermarket each loop from the rate downstream consumes and the time the loop takes. The page splits loop demand from the safety stock it carries.

What this calculator does

Replenishment quantity for a supermarket loop from consumption rate, loop time and a safety stock percentage.

Formula used

Demand per loop = downstream consumption rate × replenishment loop time
Safety stock = demand per loop × safety stock ÷ 100
Replenishment quantity = demand per loop + safety stock

Inputs explained

Downstream Consumption Rate: Mean units the downstream process withdraws per hour.
Replenishment Loop Time: Hours from a withdrawal signal to stock back on the shelf.
Safety Stock: Buffer share of loop demand for demand and route variation.

How to use the result

Best suited to sizing a line-side supermarket, resizing after a route change, checking buffer before a ramp.
One loop cannot cover a downstream shutdown or a missed route; agree a recovery rule. Slow-moving parts may never need a full loop of stock; size them separately.

Current U.S. benchmarks

U.S. manufacturing runs at 75.7% of capacity (Federal Reserve, Aug 2026). New factory orders are up 8.5% year over year (Census).

Common questions

How is this different from a reorder point? A reorder point triggers on stock level; a supermarket size refills on a fixed route schedule with a set quantity. Use this page when the route drives replenishment, and a reorder point when the level does.
Should safety stock sit in the supermarket or upstream? In the supermarket, because that is where downstream picks it. Keeping it upstream only adds retrieval time and hides the buffer from the material handler who refills it.
What if the loop runs less often than every hour? Enter loop time in hours anyway, converting minutes to a fraction of an hour, such as a 90-minute route as 1.5. The page keeps one time basis so the quantity stays in units.
Why not round the quantity up to a full pallet? Round only after the model, because pallet rounding changes the floor space and the handling. Recalculate the coverage the rounded quantity buys and accept it deliberately.

Last reviewed 2026-10-01.