How to Set Reorder Points (Without Excel Formulas)

You run out of stock on your best-selling item. Again.

You tell yourself you'll order more next time. But next time comes, and you're guessing again — maybe 50 units, maybe 100, maybe just hope it lasts until the next shipment.

If this sounds familiar, you're not alone. Most small businesses set reorder points by gut feel. And gut feel is why 43% of small businesses report lost sales due to stockouts at least once a quarter.

Here's how to fix it with a simple formula — no spreadsheets required.

What is a Reorder Point?

Put simply, a reorder point is the inventory level at which you should place a new order. When your stock hits that number, it's time to buy more.

The goal is simple: get new stock in just as the old stock runs out.

Order too early, and you tie up cash in extra inventory. Order too late, and you lose sales. A reorder point finds the sweet spot between the two.

The Two Numbers You Need

To calculate your reorder point, you need two things:

1. Average daily sales — How many units you sell per day.

2. Lead time — How many days between placing an order and receiving it.

That's it for the basic formula. Let's walk through an example.

Example: Handmade Soap Company

Let's say you run a small soap business. For your bestselling lavender soap:

• You sell 10 units per day on average
• Your supplier takes 7 days to deliver

Your reorder point is: 10 × 7 = 70 units

When your stock of lavender soap drops to 70, it's time to order more. By the time the new shipment arrives in 7 days, you'll have sold those 70 units and your stock will be at zero.

The Problem With Basic Reorder Points

The basic formula works — until something goes wrong.

What if your supplier is delayed by 3 days? Or a TikTok video goes viral and you sell 50 units in one afternoon?

That's where safety stock comes in. Safety stock is a buffer against the unexpected.

Adding Safety Stock

The formula with safety stock looks like this:

Reorder Point = (Average Daily Sales × Lead Time) + Safety Stock

A simple way to calculate safety stock:

Safety Stock = (Maximum Daily Sales × Maximum Lead Time) — (Average Daily Sales × Average Lead Time)

It looks complicated, but it's just asking: "What's the worst case, and how much extra do I need?"

Extended Example

Back to our soap company. Let's say:

• Average daily sales: 10 units
• Maximum daily sales (busy season): 18 units
• Average lead time: 7 days
• Maximum lead time (supplier delays): 12 days

Safety stock = (18 × 12) — (10 × 7) = 216 — 70 = 146 units

Reorder point = (10 × 7) + 146 = 216 units

This is much more conservative. The business keeps 146 units as a buffer against demand spikes and supplier delays. The reorder point kicks in at 216 units instead of 70.

Is 146 units of safety stock too much? That depends on:

• Cost of holding inventory — Storage space, cash tied up
• Cost of stockouts — Lost sales, unhappy customers
• Supplier reliability — How often are they late?

If your supplier is reliable and demand is stable, you can use a lower safety stock. If you're in a volatile market, lean toward higher safety stock.

Common Mistakes When Setting Reorder Points

1. Ignoring Seasonality

If you sell twice as much in December, using your annual average daily sales will give you the wrong reorder point for Q4.

Fix: Calculate reorder points based on rolling 30-60 day averages, not annual averages.

2. Using the Same Reorder Point Year-Round

Your business changes. A reorder point that worked in January may not work in July.

Fix: Review and adjust reorder points monthly, or let software do it automatically.

3. Forgetting About Lead Time Variability

Suppliers change lead times. Shipping delays happen. If you use the average lead time without accounting for variability, you'll run out of stock when things go wrong.

Fix: Track actual lead times from your suppliers and update your calculations. If a supplier is consistently late, build that into your safety stock.

4. Setting Reorder Points in Isolation

A reorder point for one product ignores what else is happening in your business. If you're running a promotion on Product A, it might cannibalize sales of Product B. If you're low on cash, you might need to delay orders.

Fix: Reorder points are a starting point. Look at the bigger picture before placing orders.

Why Spreadsheets Make This Harder Than It Needs To Be

If you're using Excel or Google Sheets for inventory, setting reorder points means:

1. Pulling sales data from wherever you track it
2. Manually calculating averages
3. Updating formulas when things change
4. Remembering to check the sheet before you run out

This works — until you have more than a handful of products. Then it becomes a part-time job just to maintain the spreadsheet.

And the real problem? Spreadsheets don't alert you. You have to remember to check. And nobody remembers to check until they hear "we're out of stock."

How Fluxventory Automates Reorder Points

Fluxventory calculates reorder points automatically based on your actual sales data and supplier lead times.

Instead of maintaining formulas in a spreadsheet, you get:

• Automatic calculations — Reorder points update as your sales data changes
• Real-time alerts — Get notified when stock hits reorder level
• Lead time tracking — The system learns your suppliers' actual delivery times
• Multi-warehouse support — Different reorder points for different locations
• Offline-first — Works even without internet, so your reorder points are always available

The system runs on your phone or tablet — no barcode scanners, no dedicated hardware, no setup cost. Just open the app, scan a barcode, and see your stock levels with reorder points calculated in real time.

Your Action Plan

Setting reorder points doesn't have to be complicated. Start simple:

1. Pick your top 5 products and calculate their reorder points using the basic formula
2. Add a safety stock buffer based on your supplier's reliability
3. Track your stockouts — if you run out, increase safety stock
4. Review monthly — adjust as your sales patterns change
5. Consider automation — once you're managing more than 20 products, manual reorder points become a full-time job

The difference between guessing and calculating is the difference between running out of stock and running a business that grows.

Ready to stop guessing? Try Fluxventory free and let the system handle your reorder points automatically.