Accounting Stock Reorder Point Calculator Examples
Worked examples show how daily demand, lead time, safety stock, and current stock affect a per-unit reorder point.
These examples use one item at a time and separate the order trigger from the eventual purchase quantity. They show how to calculate lead-time demand, reorder point, shortfall, and available stock cover.
Example 1: Regularly used maintenance part
A workshop uses a replacement part at a fairly consistent rate and typically receives deliveries within 10 days.
Input Summary
Average daily demand
12 units per day
Supplier lead time
10 days
Safety stock
30 units
Current available stock
100 units
Calculation Breakdown
- 1Lead-time demand12 × 10120 units
- 2Reorder point120 + 30150 units
- 3Current shortfallmax(0, 150 - 100)50 units
- 4Stock cover100 ÷ 128.3 days
Result Summary
Stock cover
8.3 days
Accounting Stock Reorder Point Calculator
The reorder point is 150 units, and current stock is 50 units below it.
Example 2: Retail item with short supplier lead time
A small retailer sells an item daily and normally receives a supplier delivery within 3 days.
Input Summary
Average daily demand
8 units per day
Supplier lead time
3 days
Safety stock
10 units
Current available stock
45 units
Calculation Breakdown
- 1Lead-time demand8 × 324 units
- 2Reorder point24 + 1034 units
- 3Current shortfallmax(0, 34 - 45)0 units
- 4Stock cover45 ÷ 85.6 days
Result Summary
Stock cover
5.6 days
Accounting Stock Reorder Point Calculator
The reorder point is 34 units and no shortfall exists because 45 units are currently available.
Example 3: Component with a long lead time
A manufacturer uses a component at 25 units per day, and the usual lead time is 21 days.
Input Summary
Average daily demand
25 units per day
Supplier lead time
21 days
Safety stock
100 units
Current available stock
500 units
Calculation Breakdown
- 1Lead-time demand25 × 21525 units
- 2Reorder point525 + 100625 units
- 3Current shortfallmax(0, 625 - 500)125 units
- 4Stock cover500 ÷ 2520.0 days
Result Summary
Stock cover
20.0 days
Accounting Stock Reorder Point Calculator
The reorder point is 625 units, leaving a 125-unit shortfall against 500 units available.
How to Read Your Results
The reorder point is a trigger level for available stock, not a recommended order quantity.
Lead-time demand estimates the units expected to be used before delivery arrives.
A units-needed-now result above zero means available stock is below the calculated trigger.
Stock cover converts current units into estimated days at the entered average demand rate.
Review inputs when demand, delivery performance, or the desired buffer changes.
Assumptions & Important Notes
- All examples use calendar-day lead time and average daily demand.
- Current stock means usable units available to meet demand.
- Safety stock is a chosen buffer rather than a quantity calculated by this tool.
Related Examples
Frequently Asked Questions
Can I use the calculator for retail stock and production materials?
Yes. Use it for one SKU, product, component, or supply item when daily demand and lead time can be estimated.
What does a high reorder point mean?
It usually reflects higher daily demand, a longer lead time, a larger safety-stock buffer, or a combination of these factors.
Why is stock cover lower than supplier lead time in some examples?
That can happen when current available stock is already below the reorder point, indicating a potential replenishment timing issue.
Should I round the reorder point?
For whole-unit items, it is generally practical to use a whole-unit reorder level according to the inventory system's rounding method.
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Use the live calculator with your own inputs, timing, and preferences.