Amazon glossary

What is conversion rate?

Conversion rate — The share of clicks that become sales.

By AIAdKing Editorial Team · Reviewed September 3, 2026

Conversion rate — The share of clicks that become sales: Conversion rate on Amazon is the share of ad clicks that turn into orders (orders ÷ clicks × 100). It’s the single biggest driver of ACoS: a keyword that converts well can support a higher bid, while a low-converting one wastes spend at any bid.

In depth

Conversion rate ties the listing and the ad together: ads buy the click, the listing closes the sale. Amazon listings typically convert around 10–15% — far above the wider web — but the spread between a strong and a weak listing is enormous, and every point matters because cost per order = CPC ÷ conversion rate. That division is why conversion is the single biggest ACoS driver: doubling conversion halves the ad cost of every order on every keyword simultaneously, something no amount of bid tuning can match. Images, price, reviews and A+ Content do most of the lifting — the listing optimization guide ranks the levers — and weak conversion is what makes even cheap clicks unprofitable; run the sensitivity yourself in the ACoS calculator. Per-keyword conversion, meanwhile, is what separates terms worth a high bid from terms worth negating.

Formula

Conversion rate % = (Orders ÷ Clicks) × 100

Worked example

Keyword A: 200 clicks, 24 orders — 12% conversion. Keyword B: 200 clicks, 6 orders — 3%. At a $0.60 CPC both cost $120, but A's cost per order is $5 and B's is $20. On a $24.99 product that is a 20% ACoS versus 80% — same product, same ad, same bid; conversion alone made one profitable and one a disaster. Now lift the listing's conversion from 12% to 15% with a better main image: cost per order falls to $4 and ACoS to 16% without touching a single bid.

When to use it

Look at conversion rate per keyword before any bid decision, and at listing level before scaling spend — pouring traffic on a 5% listing is premature. Recheck after price changes and review-score moves; both shift conversion within days.

Common mistakes

Optimising bids while ignoring a weak listing — cheap clicks into a page that doesn't convert is efficient-looking waste.
Using account-average conversion for keyword decisions — a 12% average hides keywords at 2% and 25% that deserve opposite treatments.
Testing price and images simultaneously — when conversion moves you won't know which lever did it; change one thing per test window.

How AIAdKing handles Conversion rate

AIAdKing sets bids against each keyword’s real conversion rate — not a flat rule — and flags listings whose low conversion is dragging ad results down.

Conversion rate — quick answers