Quick answer
Conversion rate = conversions ÷ visitors × 100. 45 conversions from 1,500 visitors is a 3% conversion rate.
Enter conversions and visitors. The calculator returns the conversion rate.
Related tools: YouTube Earnings Calculator: Estimated ad earnings from views and RPM. Average Order Value Calculator: Revenue per order. Cost Per Acquisition Calculator: Cost of acquiring one customer or conversion.
How to use the Conversion Rate Calculator
- Enter conversions (0 or more).
- Enter visitors (above 0).
- Press Calculate to see the result, and use Reset to start again.
| Input | What to enter | Allowed values |
|---|---|---|
| Conversions | A number | ≥ 0 |
| Visitors | A number | > 0 |
Formula and method
Formula
conversion rate = conversions ÷ visitors × 100
IEEE-754 double precision; shown to the decimals indicated.
Use the same period and funnel stage for both.
Worked examples
These examples are verified: each one is an automated test case that the live calculator must reproduce exactly.
Example 1
Inputs: Conversions = 45; Visitors = 1500.
| Result | Value |
|---|---|
| Conversion rate | 3% |
Example 2
Inputs: Conversions = 3; Visitors = 80.
| Result | Value |
|---|---|
| Conversion rate | 3.75% |
The first line is the headline result (conversion rate). IEEE-754 double precision; shown to the decimals indicated.
Defining a conversion
A conversion is whatever action you count, such as a purchase, sign-up or enquiry. Decide on one definition and use the same visitor measure (sessions or unique users) each time, or comparisons will mislead.
Small numbers
With 1,500 visitors a rate of 3% could easily be 2.5% or 3.5% next week by chance. Wait for enough traffic before judging a change, and use a significance test for A/B experiments.
Sample size and confidence
45 conversions from 1,500 visitors is 3%. With a sample this size the uncertainty is real: the approximate 95% range is 2.1% to 3.9%, so small differences between pages may be noise.
Be clear about what a visitor is (sessions, unique users or page views) and keep the definition the same when comparing.
How the result changes with conversions
Holding every other input at the first worked example, this table changes only conversions. It shows how sensitive the answer is to that one value; each row was produced by running this calculator.
| Conversions | Conversion rate |
|---|---|
| 22.5 | 1.5% |
| 45 | 3% |
| 90 | 6% |
| 180 | 12% |
What happens with invalid input
These messages are produced by the calculator itself, so you know what to fix.
- Visitors: entering "0" shows "Visitors must be greater than 0." beside that field and no result.
- Conversions: entering "20" shows "Conversions cannot exceed visitors." beside that field and no result.
Choosing between the Conversion Rate Calculator and similar calculators
Each row shows what a related calculator on this site asks for and what it returns, so you can pick the one that matches your question.
| Calculator | You enter | It returns |
|---|---|---|
| [YouTube Earnings Calculator](/business/youtube-money/) | views and revenue per 1,000 views | Estimated earnings |
| [Average Order Value Calculator](/business/average-order-value-calculator/) | total revenue and number of orders | Average order value |
| [Cost Per Acquisition Calculator](/business/cost-per-acquisition-calculator/) | marketing and sales spend and new customers or conversions | Cost per acquisition |
| [Cost Per Click Calculator](/business/cost-per-click-calculator/) | ad spend and clicks | Cost per click |
| [Customer Lifetime Value Calculator](/business/customer-lifetime-value-calculator/) | average revenue per customer per month, gross margin and monthly churn rate | Customer lifetime value |
Background: business metrics
Business ratios depend on exactly which costs and revenues you include, so read each page's definition. Two common checks: break-even units = fixed costs ÷ (price − variable cost per unit), so $50,000 of fixed costs with a $10 price and $5 variable cost breaks even at 10,000 units; and net profit margin = net profit ÷ revenue, so $20,000 profit on $100,000 revenue is 20%.
Return on investment ignores time: 20% over five years is far less impressive than 20% in one, so compare returns over the same period.
Assumptions and limitations
- Conversions cannot exceed visitors
If a required value is empty, not a number, or outside its allowed range, the form marks that field with a message and shows no result instead of a misleading number. The automated checks deliberately try invalid entries for visitors and conversions to confirm this.
Frequently asked questions
What is a good conversion rate?
E-commerce sites often see 1 to 4%, but it varies greatly by industry and traffic source.
How do I improve it?
Test page speed, offers, forms and trust signals.
Can conversions exceed visitors?
Not here; the calculator rejects it.
How many visitors do I need to compare two pages?
It depends on the rates and the difference you want to detect, but small samples give wide ranges, so use a significance test for A/B comparisons.
What counts as a visitor?
Sessions, unique users and page views give different rates. Pick one and keep it the same.
What does the Conversion Rate Calculator calculate?
Share of visitors who convert. It returns Conversion rate.
What formula does the Conversion Rate Calculator use?
conversion rate = conversions ÷ visitors × 100. Use the same period and funnel stage for both.
What do I need to enter in the conversion Rate Calculator?
You enter Conversions and Visitors.
How is the result rounded or limited?
IEEE-754 double precision; shown to the decimals indicated. Conversions cannot exceed visitors.
What is an example of a conversion Rate result?
With conversions 45 and visitors 1500, the conversion rate is 3%.
Related calculators
- YouTube Earnings Calculator — Estimated ad earnings from views and RPM.
- Average Order Value Calculator — Revenue per order.
- Cost Per Acquisition Calculator — Cost of acquiring one customer or conversion.
- Cost Per Click Calculator — Average cost of each ad click.
- Customer Lifetime Value Calculator — Customer lifetime value from revenue, margin and churn.
- Churn Rate Calculator — Share of customers lost over a period.
- Retention Rate Calculator — Customer retention over a period.
Sources
- Common definition used on this page. No single authoritative standard defines it, so the exact formula is stated in the formula section above
Content last reviewed 2026-11-04. Formulas and worked examples are checked by automated tests against independently computed values.