How do you calculate the revenue lost to out-of-stocks?

The calculation has three factors: the chain's annual revenue, the out-of-stock rate weighted by sales, and the share of the shortage that does not turn into a sale of something else. Multiply the three and you have the lost sales. The calculator above runs that math on your own numbers, and what out-of-stocks really cost explains where each term comes from.

Which out-of-stock rate should you enter?

Your own measurement, if you have one. No industry figure fits every chain, because each publication defines what counts as missing differently. Without a measurement of your own, treat the default as an order of magnitude only, and see how to measure out-of-stocks to build your own.

Stockout calculator: how much revenue your chain loses to empty shelves

An empty shelf never shows up in the sales report. The day closes with normal revenue and the loss stays invisible. Measure how large it is in your own operation in under a minute.

Calculate my chain's loss

Your chain's data

Where your operation stands today and where you want it to get to.

Number of stores

Monthly revenue per store (BRL)

If you do not have the exact figure, use your chain's average.

Stockout rate: 10,8%

If your chain does not measure stockouts, leave it at the industry average: 10.8% in July 2026, according to Neogrid and ABRAS, the Brazilian supermarket association. High-turnover categories go beyond 15%.

How much you want to cut: 2,0 p.p.

Sairia de 10,8% para 8,8%. This is your target, and it is here to size the potential gain. Actual results depend on your operation.

Scenario limit: the calculation does not go below a 4% out-of-stock rate. Not even the best-performing categories in the national index come close to that. Coffee, the best in July 2026, came in at 7.4%.

Calculation assumption

This field is neither your chain's data nor your target. It is the model's only parameter, taken from industry research. It is shown here in the open, and you can adjust it.

Share that becomes a lost sale: 40%

Industry parameterWhen an item is missing, some shoppers switch brands and the store keeps the sale. The rest buy somewhere else. The study by ECR Brasil with ABRAS and ACNielsen found 37% going to another store and 53% switching brands.

Estimated annual exposure

R$ 15,6 mi

Recovery if you hit this target

R$ 2,9 mi

Chain's annual revenueR$ 360,0 mi

Loss per store, per monthR$ 129,6 mil

Recovery per store, per monthR$ 24,0 mil

Equivalent share of annual revenue4,3%

Get the real number for my chain

We carry the values you simulated over with your request. No need to type them again.

This is an order-of-magnitude estimate, not a measurement of your operation. The stockout rate is measured as a percentage of missing items and is applied here to revenue, which are different bases. That can overstate the loss, because an item missing for one afternoon did not lose a full month of sales, and it can understate it, because stockouts concentrate in the fastest-moving items. It is meant to size the problem and open the conversation, not to set a figure in a proposal or a contract. The number for your own chain only comes from measuring your own data.

Where the numbers come from

10,8%

is the average stockout rate in Brazilian supermarkets, the lowest level in 12 months. It reached 22.4% in eggs and 15.9% in toilet paper.

Neogrid and ABRAS, July 2026

65,6%

of all global inventory distortion comes from items being out of stock, not from overstock. That is US$ 690.9 billion attributed to empty shelves alone.

IHL Group, Inventory Distortion Study 2026

37%

of shoppers look for the item in another store when they cannot find the brand. Another 53% switch brands, and the chain then loses margin and mix.

ECR Brasil, ABRAS and ACNielsen, 2004. It remains the most cited reference in the Brazilian industry.

How the calculation works

Chain's annual revenue: monthly revenue per store multiplied by the number of stores and by 12.
Gross loss: annual revenue multiplied by the stockout rate.
Effective loss: the gross loss multiplied by the share that actually becomes a lost sale. When the shopper switches brands, the chain keeps the revenue and loses margin, so that portion is left out.
Recovery: the same calculation applied to the target reduction in percentage points.
Independent cross-check: in the default configuration, the calculation comes to 4.3% of revenue. IHL Group, by a completely different route, estimates that stockouts cost around 4.1% of global retail sales. Two independent methods landing in the same place is what supports the order of magnitude.

The assumption is exposed on purpose. Any estimate of stockout loss depends on approximation, and it is better to debate the assumption than to debate a number nobody can trace.

Frequently asked questions

How do you calculate the revenue lost to out-of-stocks?: The calculation has three factors: the chain's annual revenue, the out-of-stock rate weighted by sales, and the share of the shortage that does not turn into a sale of something else. Multiply the three and you have the lost sales. The calculator above runs that math on your own numbers, and what out-of-stocks really cost explains where each term comes from.
Which out-of-stock rate should you enter?: Your own measurement, if you have one. No industry figure fits every chain, because each publication defines what counts as missing differently. Without a measurement of your own, treat the default as an order of magnitude only, and see how to measure out-of-stocks to build your own.

The whole topic, from the concept to prevention, is in out-of-stocks: what they are, the types, how to calculate and how to prevent them.

Want the real number for your chain?

From the sales and inventory history already in your ERP, we return the actual stockout rate by category and by store, the lost sales in monetary terms, and the 50 SKUs that cost you the most. No installation and no process change. What we ask for is a data extract and two hours of your time.

After the diagnostic, the next step is preventing stockouts from happening. That is the job of INTEGRA, the autonomous replenishment platform powered by artificial intelligence from Integrity-UX, which works on the data the chain already has to predict stockout risk and trigger replenishment ahead of time.

IT consulting specializing in infrastructure, data and artificial intelligence.

Microsoft Partner | Since 2010

Contact

+55 11 3539-9818 +55 11 2690-3607 contato@integrity-ux.com.br

Address

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Vila Hamburguesa, São Paulo/SP

CEP 05319-000

We serve clients throughout Brazil