Is units per order the same as basket size?

Yes, in most contexts. Basket size, units per transaction (UPT) and units per order all describe the average number of items in an order. Some people use basket size to mean order value instead, so check which one a report means.

What does it mean if units per order rises but AOV stays flat?

Customers are buying more items, but cheaper ones. That can be fine - for example after a multi-buy offer on low-priced items - but it's worth checking margin, because more units at lower prices can mean more fulfilment work for the same revenue.

How should I count bundles?

Either as one unit or as the number of items inside, as long as you're consistent. Mixing the two methods across reports is the most common way this metric goes wrong.

Does a higher units per order always mean more profit?

Not always. If extra units come from deep multi-buy discounts or free gifts, revenue and margin may not follow. Check net sales and gross margin alongside units per order.

Why is my units per order close to 1?

If you sell one main product, that's expected. Otherwise, it may mean customers aren't seeing relevant add-ons, or there's no reason to buy more than one item at a time.

What Is Units per Order? Formula, Benchmarks and How to Track It

Units per order is the total number of items sold divided by the number of orders. Together with average order value it tells you whether customers are buying more things or simply more expensive things.

Units per order tells you how many items the average order contains. It's the quickest way to see whether your bundles, cross-sells and multi-buy offers are actually changing how people shop - or just sitting on the page.

It's also known as units per transaction (UPT) or basket size. Read on its own it's a simple count; read next to average order value, it tells you whether customers are buying more things or simply more expensive things.

What Is Units per Order?

Units per order is the total number of items sold divided by the number of orders over a period. If a customer buys two t-shirts and a cap, that order has three units.

The number makes most sense alongside AOV. If both rise, customers are adding items. If units rise while AOV stays flat, customers are trading down to cheaper items. If AOV rises while units stay flat, they're buying pricier products rather than more of them.

🧒 Explained simply Ten kids visit your lemonade stand. Six buy one cup, and four buy a cup plus a cookie. That's 14 things sold to 10 kids, so 1.4 items per order. When you start offering "cup and cookie for $2.50", more kids take both - and that number creeps up.

How to Calculate Units per Order

Units per Order = Units sold ÷ Number of orders

Say a store sells 1,800 items across 1,000 orders in a month:

1,800 ÷ 1,000 = 1.8 units per order

Decide how to handle these before you start comparing months:

Bundles. A three-item gift set can be counted as one unit or three. The common mistake is counting it one way in some reports and the other way elsewhere. Pick one and stick to it.
Refunded items. If an item is returned, decide whether it comes out of units sold. Keep that consistent with how you treat refunds in net sales.
Free gifts and samples. Free items added to orders inflate the count without adding revenue. Exclude them or track them separately.
Cancelled and test orders. Leave them out of both the units and the order count.

Why Units per Order Matters

It shows whether cross-selling works. If you add "complete the set" suggestions and units per order doesn't move, the suggestions aren't landing. It's a direct test of merchandising.

It explains changes in AOV. When average order value moves, units per order tells you why - more items in the basket, or a shift in which items.

It affects fulfilment costs. Shipping several items in one parcel usually costs less per item than shipping them separately. A higher basket size can improve margin even when prices don't change.

It signals product fit. Products that are often bought together point to bundle opportunities and to how customers actually use what you sell.

What Is a Good Units per Order?

It depends heavily on what you sell. A single-product store sits near 1 by design, and that's fine. A store selling consumables, fashion basics or accessories naturally sees more items per order.

Rather than chase an outside figure, watch your own trend and measure the effect of each promotion. Compare units per order before and after a bundle launch, a multi-buy offer or a new cross-sell placement, and break it down by product category or customer segment to see where baskets are growing.

How to Improve Units per Order

1. Build bundles around how customers use your products

Group items that are used together - a starter kit, a full outfit, a refill pack. Price the bundle slightly below the items separately so it's an easy choice.

2. Add "complete the look" suggestions

Show matching or complementary items on product pages and in the cart. Keep suggestions relevant and few; a long list of loosely related products tends to be ignored.

3. Run multi-buy offers

"Buy 3, get 1 free" or "2 for $X" works well for consumables, socks, candles and similar items. Check the margin on each offer so extra units don't come at a loss.

4. Use a free-shipping threshold

A threshold just above your typical order gives customers a reason to add one more item. It often lifts both units and AOV.

5. Sell multipacks and sizes

Offer larger packs or multi-unit options next to the single item. Some customers will always prefer to stock up if it's easy.

How to Track Units per Order

Chartsy for Ecommerce connects to your BigCommerce store with read-only access and syncs orders, products and customers every hour. It calculates units per order from your synced store orders automatically, and you can break it down by month, product or category.

Because units, orders and net sales sit on the same dashboard, you can read units per order and AOV side by side. With ChartsyAI you can also ask for a chart directly:

"Show units per order by month for the last 12 months"
"Compare units per order and average order value this quarter"
"Which product categories have the most units per order?"

Try Chartsy for Ecommerce free for 14 days →

What is Units per Order?

Key takeaways