Conversion rate
Conversion rate is the percentage of visitors, sessions or clicks that complete a chosen action, such as a purchase, enquiry or sign-up, calculated as conversions divided by the total, multiplied by 100.
A conversion rate only means something once you say two things: what counts as a conversion and what you are dividing by. A page with 1,000 sessions and 20 enquiries converts at 2% per session; the same 20 enquiries from 600 unique users is about 3.3% per user. Both are correct, and they are not comparable with each other.
It is also a ratio, not a result. A rate can rise while the business earns less, for example when traffic falls but the visitors who remain are already decided buyers. Read it next to the absolute number of leads or sales, never on its own.
How it works
You first decide the action that matters and record it with conversion tracking: a form submission, a booking, a call click, a completed checkout. Your analytics tool counts those events and divides them by the base you chose, usually sessions or users for a website and clicks for an ad.
Most sites track more than one conversion. Keep them separate, because a newsletter sign-up and a paid order are worth very different amounts, and adding them together hides which one moved.
To check your own figure, open your analytics tool, choose one page or one traffic source and one date range, and write down two numbers: completed conversions and the base, such as sessions. Divide, then repeat for the previous period with exactly the same settings. Watch for edge cases that distort the result: duplicate form submissions counted twice, test enquiries from your own staff, spam bots filling in forms, and visitors who decline analytics cookies and so are missing from both the top and the bottom of the fraction. A rate built on 15 conversions moves by almost 7% from a single extra sale and by a third from five, so note the raw counts beside every percentage you report.
Example
A dental clinic's landing page for implant consultations gets 800 sessions in a month and 24 booking requests, a conversion rate of 3%. After the clinic moves the booking form higher on the page and removes three optional fields, the next month brings 780 sessions and 31 requests, about 4%. The number worth reporting to the owner is the seven extra consultations, with the rate explaining why.
The clinic also splits the figure by device. Desktop sessions convert at a similar rate both months, but mobile improves sharply, which tells the owner the gain came from the shorter form being easier to complete on a phone. Without that split, the team might have credited a newsletter that happened to go out the same week.
Why it matters for your business
Conversion rate tells you how well the traffic you already pay for or earn turns into business. Improving it is often cheaper than buying more visitors, because every later visitor benefits too. The trade-off is that small sites have little data: with a few dozen conversions a month, normal week-to-week noise can look like a big change, so judge trends over months rather than days.
Common mistakes
- Comparing your rate with an industry "average" found online, when those figures use different definitions, traffic sources and denominators.
- Counting every micro-action, such as scrolling or clicking a menu, as a conversion so the rate looks healthy while real enquiries stay flat.
- Changing the conversion definition halfway through a period and then comparing the new rate with the old one.
- Celebrating a higher rate without checking whether the total number of sales or leads actually went up.
Questions people ask
How do I calculate conversion rate?
Divide the number of conversions by the number of visitors, sessions or clicks in the same period, then multiply by 100. For example, 30 enquiries from 1,500 sessions is a 2% conversion rate. Always state which base you used so the figure can be compared fairly next month.
What is a good conversion rate?
There is no universal good number, because it depends on what you sell, the price, where the traffic comes from and what you count as a conversion. The useful comparison is with your own past performance for the same page and traffic source, measured the same way.
Is conversion rate the same as click-through rate?
No. Click-through rate measures how many people who saw a link or ad clicked it. Conversion rate measures how many of the people who arrived went on to complete the action you care about. One happens before the visit, the other during or after it.
