Average units sold per day
Demand assumptions · units/day
Allowed range: 0 to 1000000
Reorder Point & Quantity Calculator
Use lead time demand, safety stock and stock already on order in a constant demand plan.
Open this toolA reorder trigger and the size of the next order are related but different questions.
Enter daily demand, supplier lead time and safety stock. Include stock already on order when comparing inventory position with the refill target.
Inputs and controls
Supplier lead time
Demand assumptions · days
Allowed range: 0 to 3660
Safety stock
Demand assumptions · units
Allowed range: 0 to 1000000
Coverage after arrival
Demand assumptions · days
Allowed range: 0 to 3660
On hand units
Inventory position · units
Allowed range: 0 to 1000000
Units already on order
Inventory position · units
Allowed range: 0 to 1000000
Reserved units
Inventory position · units
Allowed range: 0 to 1000000
How to use
- Enter average units sold per day, supplier lead time, safety stock and coverage after arrival.
- Enter on hand units, units already on order and reserved units.
- Select Calculate result. Read the returned values alongside the assumptions below before copying, exporting or acting on the result.
Why use this tool
Separating trigger and replenishment quantity helps avoid ordering the target stock amount on top of inventory already committed.
Before relying on the result
Order up to target is average demand × (lead time + after arrival coverage) plus safety stock. This constant demand model does not optimise MOQ, forecast seasonality or guarantee availability.
Tool limitations
Order up to target is average demand × (lead time + after arrival coverage) plus safety stock. This constant demand model does not optimise MOQ, forecast seasonality or guarantee availability.
Questions
Does this forecast seasonal demand?
No. It uses constant entered demand. Change the assumptions when expected sales or supplier delays change.
What should I check before using Reorder Point & Quantity Calculator?
Check Average units sold per day, Supplier lead time, Safety stock and Coverage after arrival. Use the exact units shown beside the controls and replace any example values with your own inputs.
Source page last modified: 2026-10-01T18:05:21+00:00. This profile describes the tool; use its page to run it.
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