This conversion rate calculator shows the percentage of your visitors who complete an action you care about: a purchase, a lead form, a booking or a sign-up. Enter conversions and visitors to get your rate, work out how much traffic you need to reach a conversion goal, or see how many extra sales and how much extra revenue a higher conversion rate would bring from the traffic you already have. It works for an online store, a lead generation site, a landing page or an email campaign.
How to Use the Conversion Rate Calculator
Choose one of three modes with the buttons above the fields. Each mode shows only the inputs it needs.
Conversion rate
Enter conversions and visitors (sessions). You get the conversion rate as a percentage and the number of visitors it takes to produce one conversion. A rate of 2% means one conversion for every 50 visitors.
Visitors needed
Enter the conversions you want and your current conversion rate. You get the visitors you need to hit that goal and the daily traffic that represents over a 30-day month. Use this to sanity check a sales target against what your traffic can realistically deliver.
Value of a higher rate
Enter your visitors, your current conversion rate, a target conversion rate and your average order value. You get the extra conversions the higher rate would produce from the same traffic, and the extra revenue those conversions represent. This is the quickest way to put a dollar figure on a conversion project before you spend anything on it.
All results update as you type and the calculations run entirely in your browser.
Conversion Rate Formula With Worked Examples
The conversion rate formula is conversions divided by visitors, multiplied by 100:
Conversion rate = conversions / visitors x 100
The other two modes rearrange the same formula:
- Visitors needed = conversion goal / (conversion rate / 100)
- Extra conversions = visitors x (target rate minus current rate) / 100, and extra revenue = extra conversions x average order value
Examples
These are example numbers, not benchmarks.
| Mode | Inputs | Result |
|---|---|---|
| Conversion rate | 85 orders from 4,200 sessions | 2.02%, about one order per 49 sessions |
| Visitors needed | 100 orders wanted at a 2% rate | 5,000 visitors, about 167 a day |
| Value of a higher rate | 4,200 sessions, 2% to 2.5%, $90 order value | 21 extra orders, $1,890 extra revenue |
The last row is the one most teams underestimate. Half a percentage point sounds small, but on the same traffic it is a 25% increase in orders, with no extra ad spend.
Sessions, Users or Clicks: Choosing the Denominator
Your conversion rate depends as much on what you divide by as on what you count. The main tools use different definitions, which is why two reports rarely agree.
| Source | How it calculates conversion rate |
|---|---|
| GA4 | Conversions are now called key events. Session key event rate divides sessions with a key event by all sessions. User key event rate divides users who triggered a key event by all users |
| Shopify analytics | Sessions that ended in an order divided by all online store sessions |
| Google Ads | Conversions divided by ad interactions (usually clicks) for the same period |
| Email platforms | Usually conversions attributed to the email divided by emails delivered or by clicks, depending on the report |
A user-based rate is usually higher than the session-based rate for the same site, because one person often visits several times before buying. Neither is wrong. Pick one definition, label it in your reports and compare like with like.
Types of Conversion Rate You Can Calculate
The same formula measures very different things depending on what you count as a conversion and who you count as a visitor. The calculator handles all of them.
| Type | Conversions | Divided by |
|---|---|---|
| Ecommerce conversion rate | Orders | Store sessions |
| Website or lead conversion rate | Form submissions, calls, bookings | Website sessions or users |
| Landing page conversion rate | The page's main action | Visits to that page |
| Sales conversion rate | Deals won | Qualified leads or opportunities |
| Ad conversion rate | Conversions from the ad | Ad clicks |
| Email conversion rate | Orders or sign-ups from the email | Emails delivered or clicks |
Track micro conversions too, such as add to cart, checkout started or pricing page views. They show where people drop out, which a single site-wide rate cannot.
Calculating a lead-to-customer rate
For a service business, the website rate is only half the story. Enter deals won as conversions and qualified leads as visitors to get your sales conversion rate. Example numbers: 12 deals from 80 qualified leads is 15%. Multiply the two stages to get the full picture: a 3% website rate followed by a 15% close rate means 0.45% of visitors become customers, or about one customer for every 222 visitors. That end-to-end number is the one to use when you decide how much traffic a revenue target needs.
Judging Your Conversion Rate Against the Right Baseline
A conversion rate is good when it is improving against your own history for the same traffic, and when it supports a profitable cost per acquisition. Site-wide averages from other businesses are a poor comparison because the number depends heavily on things that have nothing to do with how well your site works.
- Traffic mix. Email and brand search visitors convert far more readily than cold social traffic. A month with more prospecting ads will show a lower site-wide rate even if nothing on the site changed.
- Price and consideration. A low-priced consumable converts more readily than a high-ticket item people research for weeks.
- Device. Mobile sessions often convert at a lower rate than desktop, so a shift in device mix moves the overall number.
- What counts as a conversion. A newsletter sign-up rate and a purchase rate are different metrics and should never share a target.
Ranges vary by industry, price point and traffic source. Segment your rate by channel and device before you decide it is too low.
What a Higher Conversion Rate Is Worth in Ad Costs
Conversion rate decides how much each sale costs you in paid media, because CPA = cost per click / conversion rate. Example numbers: at a $1.00 cost per click, a 2% conversion rate means a $50 cost per acquisition. Lift the rate to 2.5% and the same click buys a sale for $40. Every ad campaign pointing at that page gets cheaper at once, with no change to bids.
That is why conversion work often pays back faster than finding more traffic. Use the third mode of this calculator to size the revenue, then run the new CPA through our CPA calculator to see what it does to profit per order.
Planning Traffic and Budget for a Sales Goal
The visitors needed mode turns a sales target into a traffic target, which you can then turn into a budget. This is how to check whether a goal is realistic before the month starts.
- Start with the goal. Enter the orders or leads you need and your current conversion rate for the channel that will deliver them, not the site-wide rate.
- Read the traffic requirement. Example numbers: 150 orders at a 1.5% rate needs 10,000 visitors, about 333 a day.
- Price the traffic. If paid search will supply those visitors at a $1.20 average cost per click, that is about $12,000 in ad spend, or an $80 cost per order.
- Check it against margin. If an order earns less than $80 in gross profit, the goal cannot be reached profitably with that traffic at that rate. Either the conversion rate, the order value or the click cost has to change.
Our PPC calculator runs this full forecast from budget, CPC, conversion rate, order value and margin in one step.
Why Small Samples Make Conversion Rates Misleading
With little traffic, conversion rates jump around for reasons that have nothing to do with your site. Ten orders from 400 visitors is 2.5%. One more order is 2.75%, a 10% relative increase from a single customer.
- Compare periods long enough to cover full weeks, because weekday and weekend behavior differ.
- Do not call a winner on a page change after a few days. Run a proper split test and check the result with our A/B test calculator, which also tells you how many visitors you need before you start.
- Watch for outside events, such as a sale, an email send or a press mention, that change traffic quality for a few days.
Common Reasons a Conversion Rate Suddenly Drops
When the rate falls sharply from one week to the next, check these in order before redesigning anything.
- Tracking. A theme update, a new consent banner or a checkout change can stop conversions being recorded while orders continue as normal. Compare your analytics with the orders in your store or CRM.
- Traffic mix. A new prospecting campaign, a viral social post or a referral from an unrelated site can add many low-intent sessions.
- Site errors. Test checkout and forms on mobile and desktop. Payment failures, broken discount codes and form errors are common and silent.
- Speed. A new app, script or uncompressed image can slow key pages enough to lose buyers.
- Offer and stock. Sold-out bestsellers, higher shipping costs or the end of a promotion all lower the rate without any fault on the site.
When the Rate Will Not Move
If tracking is clean, traffic is relevant and the rate still sits where it was, the next step is structured testing: research where people drop out, form a hypothesis, test it properly and keep what wins. That is the work our conversion rate optimization team does, using analytics, heatmaps and session recordings before any design change. For ad traffic, a dedicated page from our landing page design service often converts better than sending clicks to the home page. Request a free audit to see where your funnel loses the most visitors, or browse our other free marketing tools.