The short version: conversion rate is (number of conversions divided by total visitors or leads) multiplied by 100. That’s the whole formula. Where people go wrong isn’t the maths, it’s what they count as a “visitor” and what they call a “conversion,” and those two decisions can move your number by 300% without your business changing at all.
The formula itself
Here it is, no drama:
- Conversion Rate = (Conversions ÷ Total Visitors or Leads) x 100
So if your landing page got 2,000 visitors last month and 60 people bought something, your conversion rate is 60 ÷ 2,000 x 100 = 3%.
If you’re measuring sales conversion instead of website conversion, swap “visitors” for “leads”: 60 sales from 200 leads is 30%. Same formula, different denominator. That swap is where most of the confusion starts, and I’ll get to it.
A real example from my own funnel
Last year I ran a lead magnet campaign, a short guide, gated behind an email opt-in, promoted through LinkedIn and a small ad spend. Over three weeks it got 1,180 sessions in Google Analytics and 36 opt-ins. That’s 36 ÷ 1,180 x 100 = 3.05%.
Except that wasn’t the real number. When I filtered out bounced sessions under 5 seconds, which is a decent proxy for bots and accidental clicks, unique real traffic dropped to 940. Same 36 opt-ins, new rate: 3.83%. Nearly a full point higher, from doing nothing except cleaning the denominator.
Which number do you report to a client, or to yourself, when you’re deciding whether the campaign worked? Most people report whichever one is bigger. I don’t. I report both, and I say which one I trust and why, because the point of the number is to make a decision, not to feel good.
The step by step, done
If you want a conversion rate you can act on, work through it in this order:
- Define the conversion first. Is it a sale, a booked call, an email signup, an add to cart? Pick one per calculation. Blending them gives you a fake number.
- Pick your time window and stick to it. Weekly numbers on low traffic sites bounce around wildly. I’d rather look at 30 or 90 days for anything under 1,000 monthly visitors.
- Decide your denominator: total sessions, unique users, or unique visitors. Sessions inflate your traffic count because one person can create several sessions in a day. Unique users gives you a more honest rate, and it’s usually the smaller of the two, which is exactly why fewer people report it.
- Strip out obvious junk traffic where you can. Bot sessions, internal staff visits, and test orders all count as “visitors” in raw exports and none of them are real prospects.
- Do the division, multiply by 100, done. Then compare it to last period’s number using the same rules, not a different denominator, or you’re comparing two different formulas and calling it a trend.
If you want the fuller breakdown of where to pull these numbers from inside Google Analytics or your CRM, I’ve written a separate piece on where to find your website conversion rate that walks through the exact reports.
The mistake almost nobody flags
Here’s the uncomfortable bit. A rising conversion rate is not automatically good news, and a falling one is not automatically bad news. I’ve watched a client’s checkout conversion rate climb from 1.8% to 4.1% over two months and get excited about it in a review meeting, until we looked at revenue and it had barely moved. Why? Because the ad targeting had narrowed to a cheaper, more desperate audience who converted more often on a discount code and then never bought again. The rate went up. The business didn’t.
The formula measures a ratio, not a result. A tiny denominator with one lucky sale gives you an eye watering percentage that means nothing repeatable. Ten visitors, one sale, that’s a “10% conversion rate” that you’d be foolish to build a forecast on. Most conversion rate content will hand you the equation and stop there. The equation was never the hard part. Deciding what counts, and refusing to celebrate a percentage that isn’t backed by real volume, is the actual skill.
Different conversion rates, same formula
People often ask “what’s the formula” when they mean one of several different rates. They all use the same maths, just different inputs:
- Website conversion rate: sales or leads ÷ site visitors x 100
- Sales conversion rate: customers ÷ leads or opportunities x 100. This is the one sales teams live and die by, and benchmarks vary hugely by stage and industry, which I’ve broken down in what good conversion rates in sales look like by stage and sector.
- Ad conversion rate: conversions ÷ ad clicks x 100, tracked at the platform level, which matters if you’re running several campaigns and trying to work out how many Facebook ads you should be running at once without spreading your budget too thin to get a usable sample size.
- Email conversion rate: click throughs or purchases ÷ emails delivered (not sent) x 100.
If you want the wider view of how these rates are calculated and which one applies to your situation, I go into more detail in what conversion rates are and how to calculate yours.
What counts as a good number
I get asked “is 3% good” constantly, and the honest answer is that it depends entirely on what you’re converting and where the traffic came from. A cold Facebook ad audience landing on a $2,000 coaching offer converting at 3% would be extraordinary. A branded search visitor converting at 3% on a $15 product would be a problem. Averages you see quoted online, the “2.35% average landing page conversion rate” type of stat, are averaged across every industry and every traffic source imaginable, so treat them as a rough sanity check, not a target.
What matters more than hitting a benchmark number is watching your own rate move over time against your own baseline, and understanding what changed when it did.
Why I stopped obsessing over the percentage alone
For years I tracked conversion rate like it was the scoreboard. Then I started running my business in public again after five rough years of rebuilding, and I noticed something: the metric that paid my bills wasn’t the conversion rate itself, it was revenue per visitor, which factors in your average order value alongside the rate. A page converting at 2% on a $500 sale beats a page converting at 6% on a $40 sale, every time, and yet the 6% page is the one that gets the applause in a meeting.
If you’re a solopreneur without hours to spend dashboard watching, I’d rather you track fewer numbers than five numbers badly. I wrote about exactly this kind of stripped back approach in a marketing strategy for solopreneurs who have no time, and conversion rate is one of maybe three numbers that belong on that shortlist.
How I explain this in front of a room
When I spoke at the Israel Networking Hub on getting found and getting clients, someone asked me why their “conversion rate looked fine” but they still weren’t making money. Same story every time: they were measuring the wrong stage of the funnel. Their site conversion rate from visitor to lead was healthy. Their sales conversion rate from lead to paying client was dismal, and nobody was tracking it because it required pulling data out of a CRM instead of a free analytics dashboard. The formula was never the problem. Measuring only the easy half of the funnel was.
Frequently asked questions
What is the basic formula for conversion rate?
Conversion rate equals the number of conversions divided by the total number of visitors or leads, multiplied by 100 to give you a percentage. For example, 60 sales from 2,000 visitors is 60 ÷ 2,000 x 100, which equals 3%.
Do you use sessions or users to calculate conversion rate?
Unique users gives you a more accurate rate because sessions can count the same person multiple times in one day, inflating your traffic number and quietly deflating your conversion rate. If you’re comparing rates over time, pick one and use it consistently, because switching between the two makes your trend line meaningless.
What’s a good conversion rate for a small business website?
Anywhere from 2% to 5% is typical for most small business websites, though this varies enormously by industry, traffic source, and price point. A better benchmark than any industry average is your own site’s history, because averages get skewed by outlier industries with very high or very low intent traffic.
Why did my conversion rate go up but revenue stayed flat?
This usually happens when your traffic mix shifts toward cheaper, lower intent visitors who convert more often on a small offer but spend less or don’t return. A rising percentage on a shrinking or lower value denominator can look like a win while your actual revenue per visitor quietly drops, so always check the number alongside average order value, not on its own.
