Average order value (AOV)
Average order value (AOV) is total revenue divided by the number of orders. It is simple but easy to misread: a few large orders pull the mean upward, refunds and taxes change what 'revenue' means, and mixing currencies without conversion corrupts it. For skewed order sizes, the median order value is often more honest.
What this means
AOV = total revenue ÷ number of orders over a period. It answers 'how big is a typical order' and feeds revenue forecasts and LTV models. The definition of 'revenue' is a choice: gross, net of refunds, net of tax and shipping — each yields a different AOV, so state which you mean.
Why the mean misleads
Order sizes are usually skewed: many small orders and a handful of large ones. The mean is sensitive to those large orders, so AOV can rise because of a few outliers rather than a broad shift. When the distribution is skewed, the median order value describes the typical customer better. Mixing currencies, or counting refunded orders at full value, also distorts the figure.
Always report AOV alongside order count and the revenue basis, and consider the distribution rather than the single mean.
- AOV = revenue ÷ orders, so the revenue basis matters
- A few large orders pull the mean up
- Median order value is steadier under skew
How it appears in analytics and logs
AOV is the mean order size. A rising AOV can be genuine basket growth or just a few outlier orders; the mean alone cannot tell which, so pair it with a distribution or median.
Diagnostic use case
Track AOV to understand typical order size and to model revenue, while checking skew and stating whether revenue is gross, net of refunds, or net of tax.
What WebmasterID can help detect
WebmasterID records purchase events with their value first-party, so AOV reflects your own orders rather than an external estimate.
Common mistakes
- Reading a mean AOV without checking for outlier skew.
- Not stating whether revenue is gross, net of refunds, or net of tax.
- Mixing currencies without converting to one base.
Privacy and accuracy notes
AOV is an aggregate ratio of revenue to orders; no personal data is needed. WebmasterID measures purchase events with value first-party.
Related pages
- Customer lifetime value (LTV)
Customer lifetime value (LTV or CLV) estimates the total revenue or margin a customer generates across their whole relationship. It is a forecast built on assumptions about retention, purchase frequency, and margin — not a measured number. Treated as fact it misleads; treated as a model with stated assumptions it guides acquisition spend.
- Cart abandonment
Cart abandonment happens when a visitor adds items to a cart but does not complete the purchase. The rate is usually one minus (purchases ÷ carts created). It is a useful friction signal, but it overstates 'lost sales' because many adds are research, comparison, or saving for later — not abandoned intent.
- Conversion rate: definition and denominators
Conversion rate is the share of some base that converted. The trap is the denominator: conversions per session, per user, and per unique visitor give different numbers and mean different things. Without stating the base, a conversion rate is ambiguous — and comparing rates with different bases is meaningless.
- Attribution analytics
Connect order value to sources directionally.
Sources and verification notes
Last reviewed 2026-06-24. Facts are checked against primary/official sources where available; uncertain specifics are marked “Data not yet verified” rather than guessed.