Free Reorder Point Calculator
Find out exactly when to reorder before you run out of stock. No signup required. Enter your average daily usage, supplier lead time, and safety stock, and Encarmo calculates your reorder point instantly.
Reorder Point Trigger
Order trigger inventory threshold
How to calculate your reorder point in 5 steps
Find your average daily usage
How many units of this item you typically sell or use per day, based on recent sales history.
Enter your lead time
The number of days between placing a purchase order with your supplier and receiving the stock.
Set your safety stock
A buffer quantity to cover unexpected spikes in demand or delays in delivery.
Use the advanced calculator if needed
Enter your maximum daily usage and maximum lead time, and Encarmo calculates a safety stock number instead of a guess.
Review your reorder point
Encarmo adds average usage during lead time to your safety stock, showing the exact quantity that should trigger a new order.
What is a reorder point?
A reorder point is the inventory level at which a new purchase order should be placed, so replacement stock arrives before the current stock runs out. Wait until inventory hits zero, and the business runs out during the wait for the new shipment. Reorder too early, and cash sits tied up in inventory that isn't needed yet.
The three numbers behind a reorder point
Average daily usage — What actually moves
How many units get sold or consumed per day on average, based on recent history rather than a guess.
Lead time — How long the wait is
How many days pass between placing an order and the stock actually arriving and being ready to sell.
Safety stock — The buffer
Extra units to absorb a demand spike or a supplier delay, so a single bad week does not turn into a stockout.
Worked example: a simple reorder point calculation
Store selling 20 units/day with 7-day supplier delivery window
| Average daily usage | 20 units/day |
| Lead time | 7 days |
| Lead time demand | 20 × 7 = 140 units |
| Safety stock | 40 units |
| Reorder point (ROP) | (20 × 7) + 40 = 180 units |
When stock on hand drops to 180 units, it is time to reorder. At 20 units sold per day, that is roughly 9 days of stock remaining, enough to cover the 7-day lead time plus a buffer. This example uses a manually entered safety stock; the advanced calculator above computes one instead from your maximum usage and lead time.
Reorder point vs. safety stock: what's the difference?
| Reorder Point | Safety Stock | |
|---|---|---|
| Shows | The inventory level that triggers a new order | The buffer quantity built into that level |
| Formula | (Avg Daily Usage × Lead Time) + Safety Stock | (Max Daily Usage × Max Lead Time) - (Avg Daily Usage × Avg Lead Time) |
| Answers | When should I reorder? | How much extra should I keep on hand? |
| Changes when | Usage or lead time changes | Demand or delivery variability changes |
Why accurate reorder point planning matters
Preventing stockouts
Reordering at the right level means new stock arrives before the shelf goes empty, protecting sales that would otherwise go to a competitor.
Reducing excess inventory
Reordering too early or keeping too much safety stock ties up cash and warehouse space that could go toward other parts of the business.
Planning around supplier delays
A longer or less reliable lead time raises the reorder point, so this number should be revisited any time a supplier relationship changes.
Managing seasonal demand
Products with predictable seasonal spikes need a different reorder point during peak periods than during the rest of the year.
Why use Encarmo's free reorder point calculator
Completely free, no limits
Run unlimited calculations with no paywall or watermark.
No signup required
Get your reorder point instantly as a guest.
Includes an advanced safety stock formula
Not just a manual guess, when you have the usage data for it.
Works for any unit type or product
No category or SKU restrictions.
Clean, downloadable summary
Download the numbers to share with a supplier or ops teammate.
Questions people ask us
Clear, direct answers on methodology, formulas, and usage.
Is this reorder point calculator really free?
What's the difference between reorder point and safety stock?
How do I find my average daily usage?
What if my supplier's lead time varies?
What happens if I set my safety stock too low?
What happens if I set my safety stock too high?
Does this work for seasonal products?
How often should I recalculate my reorder point?
Do I need inventory software to use this?
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