What is sales per store per day?

Short answer: Sales per store per day is the month's sales divided by the number of stores that actually have stock, then divided by the number of days. It shows whether shoppers in a single store are picking the product up more or less often, while total sales can grow simply because more stores were added.

The formula

Sales per store per day = units sold in the month ÷ stores in stock ÷ days in the month

Hypothetical example: a product is in stock in 2,000 stores and sells 24,000 units in a 30-day month. That gives 24,000 ÷ 2,000 ÷ 30 = 0.4 units per store per day, meaning the average store sells two units every five days.

Why total sales mislead

Suppose total sales rise to 30,000 units the next month. That looks like 25% growth. But if the product reached 2,800 stores that month, sales per store per day drop to about 0.36 units: each store sold less. Total sales grew because there were more stores, not because more people bought. A brand that concludes its marketing worked will make the wrong calls on both budget and stock.

7-Eleven Thailand had 16,284 stores at the end of June 2026, and same-store sales grew 0.8% that quarter (Q2 2026 results filing by the operator of 7-Eleven Thailand, via SET). When existing stores grow slowly, the competition for shelf space comes down to how much each store sells.

Three things that make the number wrong

1. Using stores approved instead of stores actually in stock. A product approved for several thousand stores doesn't have stock in all of them all month. Use the wrong figure and the divisor is too big, so sales per store look too low.
2. Using what the distributor ships in instead of what shoppers buy. Shipments (sell-in) can be high because stores are restocking. Shopper purchases (sell-out) are the number to use.
3. Comparing promotion months with non-promotion months. If one month had a discount, look at it separately, or always add a note.

What you can use it for

• Set a target you can act on. "Raise sales per store per day from 0.4 to 0.5 units" is clearer than "increase brand awareness".
• Compare areas. Sales per store per day in Bangkok versus other provinces helps choose where to run ads or add content.
• Speak the same language as distributors and buyers. Per-store figures show the product actually pulls shoppers, not just that it is widely distributed.
• Judge whether marketing pays. Adding 0.1 units per store per day sounds small, but multiplied by thousands of stores and dozens of days it becomes tens of thousands of units.

If you don't have store-level data

Many brands don't see store-level sales directly. Ask the distributor what reports they get from the retailer, how often, and at what level. If you only get monthly totals, you can still calculate the average by also asking for the number of stores in stock that month. If you only get order data, use it as an estimate and always label it as orders, not shopper purchases.

Limits

• An average hides differences between stores; an office-district store and a neighbourhood store may sell very differently
• All numbers in the example are hypothetical and don't say how much any category should sell
• Store counts from the news describe the whole network, not the stores carrying any particular product

FAQ

What level of sales per store per day is safe? There is no public threshold. Buyers compare with other products in the same category. Watch your own trend, and ask your distributor which reference products the category has.

Should we measure monthly or weekly? If you have weekly data, watch it weekly during campaigns, and use monthly figures for budget decisions.

Is sales per store per day the same as sell-through? Sell-through usually means the share of stock sold out of what was shipped to stores. Sales per store per day measures how many units shoppers buy in one store per day. Use them together.

Sources

• Q2 2026 results filing by the operator of 7-Eleven Thailand, via SET: https://weblink.set.or.th/dat/news/202608/0737NWS130820261708080510T.pdf
• Subpayanunt, FMCG distribution strategy (sell-in, sell-out; Thai): https://www.subpayanunt.com/post/distribution-strategy-fmcg-thailand

Related guide: Listed in 7-Eleven Thailand but Not Selling?

Free tool: Sales per store per day, promotion stock and marketing break-even calculator

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