Average Order Value (AOV)
The average amount spent per transaction — a key revenue metric multiplied directly by conversion rate to calculate overall revenue.
Average Order Value (AOV) is the average revenue generated per completed transaction.
Formula:
AOV = Total Revenue ÷ Number of Orders
Example: €120,000 revenue from 2,400 orders = €50 AOV
AOV is one of three multipliers of total revenue (alongside traffic and conversion rate). Increasing any one of them increases revenue proportionally — making AOV optimization an often-underused lever in e-commerce CRO programs.
The Revenue Formula
Revenue = Traffic × Conversion Rate × AOV
| Lever | Current | 20% increase | Revenue impact |
|---|---|---|---|
| Traffic | 50,000/mo | 60,000/mo | +€20,000/mo |
| CVR | 2.5% | 3.0% | +€20,000/mo |
| AOV | €80 | €96 | +€20,000/mo |
All three produce the same revenue increase — but AOV improvements often require less traffic and simpler implementation than CVR improvements.
Strategies to Increase AOV
Free Shipping Threshold
Setting a free shipping threshold slightly above the current AOV is one of the highest-ROI AOV tactics. If AOV is €45, a “Free shipping on orders over €55” threshold creates strong motivation to add an extra item.
Implementation note: Use dynamic cart messaging — “Add €8 more for free shipping” rather than just displaying the threshold. The progress indicator increases urgency and specificity.
Product Upsells
At checkout or on the product page, present a premium version of the item in the cart: “Upgrade to Pro — includes X, Y, Z — for €15 more.”
Effective upsells:
- Clear incremental value proposition
- Price differential feels small relative to the base purchase
- Single click to accept (no re-entering payment details)
Order Bumps (Checkout Add-ons)
A single-checkbox add-on at checkout, priced at 10–30% of the base order value. Because the visitor has already committed to buying, the resistance to a small incremental purchase is low.
Cross-Sells
Recommendations of genuinely complementary products — ideally based on purchase data, not just category logic. “Frequently bought together” modules consistently lift AOV when powered by actual co-purchase data.
Quantity Discounts
“Buy 2, save 10% — Buy 3, save 20%” creates a natural AOV floor increase for repeat-purchase items (supplements, consumables, office supplies).
AOV vs Revenue Per Visitor
AOV tells you the average transaction size. Revenue Per Visitor (RPV) tells you the average revenue contribution of each visitor — the metric that ties CVR and AOV together:
RPV = Conversion Rate × AOV
| CVR | AOV | RPV |
|---|---|---|
| 2.0% | €60 | €1.20 |
| 2.0% | €80 | €1.60 |
| 3.0% | €60 | €1.80 |
| 3.0% | €80 | €2.40 |
When running A/B tests on pages that affect both CVR and AOV (e.g., product pages, checkout), RPV is the correct primary metric — a test that increases CVR slightly but reduces AOV might be a net loss.
Frequently Asked Questions
What is average order value (AOV)?
Average order value (AOV) is the average revenue generated per completed transaction. It's calculated as: AOV = Total Revenue ÷ Number of Orders. If a store generates €50,000 in revenue from 1,000 orders, the AOV is €50. AOV is one of three core levers of e-commerce revenue (alongside traffic and conversion rate) — doubling any one of them doubles revenue, all else being equal.
How do I increase average order value?
The five highest-impact AOV tactics: (1) Order-value-based free shipping threshold — 'Add €12 more for free shipping' increases average basket size. (2) Product upsells — offer a premium version or add-on at checkout. (3) Cross-sells — 'Customers who bought X also bought Y.' (4) Product bundles — bundle related items at a slight discount. (5) Quantity discounts — 'Buy 3, save 15%.' These work because they target buyers who have already decided to purchase, so the resistance is lower.
What is the relationship between AOV and conversion rate?
AOV and conversion rate together determine revenue per visitor: Revenue Per Visitor (RPV) = Conversion Rate × AOV. A site with 2% CVR and €60 AOV generates €1.20 per visitor. Raising CVR to 3% (same AOV) generates €1.80/visitor. Raising AOV to €90 (same CVR) also generates €1.80/visitor. In CRO, both levers matter — but they require different interventions and often have different traffic volume requirements to test effectively.