What is Conversion rate?
Conversion rate is the percentage of visitors who complete a defined action — a signup, a purchase, a trial start. It is only meaningful alongside its denominator, because the same 200 conversions produce very different rates when divided by visitors, by sessions, or by people who reached the checkout.
The formula, and the trap in it
Conversion rate = conversions ÷ visitors in the same periodThe trap is the denominator. Consider 200 signups from a month with 10,000 visitors, 14,000 sessions and 2,500 people who reached the pricing page:
| Denominator | Rate | What it answers |
|---|---|---|
| Visitors | 2.0% | How well the whole site converts |
| Sessions | 1.4% | How well a single visit converts |
| Pricing-page visitors | 8.0% | How well the pricing page converts |
All three are correct. None is comparable to the others, and switching between them mid-report is the most common way a conversion number becomes fiction. Pick one, write it on the report, keep it.
”Good” conversion rates do not transfer
Published benchmarks average across businesses with nothing in common: free trials against enterprise demos, $9 purchases against $9,000 ones, branded traffic against cold ads. A rate that is excellent for one is a catastrophe for another.
The only benchmark worth acting on is your own, last month, measured the same way. Segment it by channel and landing page and the useful comparison appears immediately — the gap between your best segment and your worst is a real, reachable target in a way that an industry average never is.
Improving it
Conversion rate is one of the three multiplicative levers on revenue, with traffic and average order value. It is also where a funnel earns its keep: a single rate tells you that people are not converting, and a funnel tells you at which step they stop, which is the only version of the information you can act on.
Beware optimising the rate in isolation. Cutting a qualifying step raises conversion and lowers the quality of what converts. Watch conversion rate and revenue per visitor together — a change that moves one up and the other down is not an improvement.