What is Conversion Rate?
Conversion rate is the percentage of visitors who complete the action you're measuring. It's the most leveraged number in digital marketing because it multiplies everything upstream of it: doubling conversion rate has exactly the same effect on revenue as doubling traffic, and it's almost always cheaper to achieve. The definition matters more than the formula — a conversion rate is meaningless until you've said conversion of what, measured against which denominator.
Why it matters
- It's a multiplier, not an addition. Every improvement applies to all current and future traffic at once, including traffic you're already paying for.
- It sets your cost per acquisition directly — CPA is cost per click divided by conversion rate, so the two move in lockstep.
- It's the fastest way to tell whether a traffic problem is really a traffic problem. Flat conversion with rising traffic is a scale question; falling conversion with rising traffic is a targeting or experience question.
The formula
Conversion Rate = (Conversions ÷ Visitors) × 100
- Conversions
- — completed target actions in the period
- Visitors
- — sessions or unique users over the same period — pick one and stay consistent
How to use this calculator
- 01Define the conversion precisely: a purchase, a qualified lead, a trial start. Vague definitions produce numbers you can't act on.
- 02Choose sessions or unique users as your denominator and never mix them — the same site can report 2% or 3.5% depending purely on that choice.
- 03Enter both figures for the same period and segment.
- 04Then segment: by device, channel, and landing page. The blended rate rarely tells you where the problem is.
Worked example
An ecommerce store had 25,600 sessions last month and 640 completed orders.
- Conversions = 640
- Sessions = 25,600
- Conversion rate = (640 ÷ 25,600) × 100 = 2.5%
2.5% is around the middle of the ecommerce range. Getting to 3% would add 128 orders a month from exactly the same traffic — which is usually cheaper than buying 20% more visitors.
Industry benchmarks
Compiled August 2026
Ecommerce (all traffic)
1.5% – 3%
Mobile typically runs well below desktop.
B2B lead generation
2% – 5%
Measured to form submission, not to closed deal.
SaaS free trial signup
3% – 8%
Higher when the trial requires no card.
Paid search landing pages
3% – 6%
Higher intent than blended site traffic.
Common mistakes
- Switching between sessions and users as the denominator, which changes the result by a third or more with no real change underneath.
- Reporting one blended site-wide rate when mobile and desktop behave completely differently and need separate decisions.
- Counting micro-conversions like newsletter signups in the same number as purchases, which flatters the rate and hides the real funnel.
- Declaring a test winner on a few hundred visitors, where the observed difference is almost certainly noise.
How to improve your CVR
Find where in the funnel people actually leave
A low overall rate is a symptom. Measuring step-to-step drop-off tells you whether the problem is the product page, the cart, or the checkout form.
Measure checkout drop-off →Size the test before you run it
Most conversion tests are called too early on too little traffic. Knowing the sample size in advance tells you whether the test is worth running at all.
Calculate A/B test sample size →Fix page speed before redesigning anything
Load time affects conversion rate on every page at once, and it's usually a cheaper fix than a redesign with a smaller effect.
Model the revenue impact of site speed →Frequently asked questions
What's a good conversion rate?+
Broadly 1.5–3% for ecommerce and 2–5% for B2B lead generation, but the honest answer is that your own last twelve months is the only benchmark that accounts for your traffic mix, price point, and buying cycle.
Should I use sessions or unique visitors?+
Either works as long as you're consistent. Sessions is the more common ecommerce convention and produces a lower number, since one person browsing across three sessions counts three times.
Why is my mobile conversion rate so much lower?+
Partly behaviour — mobile is used more for browsing and research — and partly friction: forms, payment entry, and slow loading all hurt more on a phone. A gap is normal; a very large gap usually means fixable friction.
Is it better to increase traffic or conversion rate?+
Conversion rate, in almost every case where there's obvious room. It costs nothing per additional visitor, compounds with future traffic, and improves the return on the traffic you're already buying.
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