Business
Inventory reorder point
Estimate when to reorder from demand during lead time plus safety stock.
Calculators / Business / Reorder cycle quantity
Reorder cycle quantity calculator
Calculate a simple replenishment quantity for a chosen demand coverage cycle.
On this page
Target inventory170
Suggested order quantity70
Net stock position100
Calculator controls
How to calculate
Calculate a simple replenishment quantity for a chosen demand coverage cycle.
Target inventory =
daily*cycle+bufferSuggested order quantity =
((daily*cycle+buffer-stock-incoming+abs(daily*cycle+buffer-stock-incoming))/2)Net stock position =
stock+incomingWorked example
- Expected daily demand: 20
- Review cycle (days): 7
- Safety buffer (units): 30
- Usable stock units: 80
- Confirmed incoming units: 20
- Target inventory: 170
- Suggested order quantity: 70
- Net stock position: 100
Assumptions and limits
The cycle must include the time you intend to cover, including lead time if appropriate. Backorders, minimum order sizes and uncertain deliveries are excluded.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Calculate a simple replenishment quantity for a chosen demand coverage cycle. Build the target from daily demand times coverage days plus a buffer. Subtract usable stock and confirmed incoming units, then floor the order at zero.
When this tool is useful
Build the target from daily demand times coverage days plus a buffer. Subtract usable stock and confirmed incoming units, then floor the order at zero.
Understanding your inputs
| Input | Example |
|---|---|
Expected daily demand daily | 20 |
Review cycle (days) cycle | 7 |
Safety buffer (units) buffer | 30 |
Usable stock units stock | 80 |
Confirmed incoming units incoming | 20 |
Frequently asked questions
What does this estimate leave out?
The cycle must include the time you intend to cover, including lead time if appropriate. Backorders, minimum order sizes and uncertain deliveries are excluded.
How do I check the example?
Use the stated units and the formula below. Keep full precision until the final answer; change one input at a time to see its effect.