Conversion Rate Calculator
Measure the percentage of visitors who complete a desired action — a purchase, sign-up, or download — by dividing conversions by total visitors. Use it to evaluate landing pages, ad campaigns, and A/B test results.
About this calculator
Conversion rate expresses what fraction of your audience takes the target action you want, stated as a percentage. The formula is: Conversion Rate (%) = (Conversions / Total Visitors) × 100. 'Conversions' can mean any defined goal: a completed purchase, form submission, free-trial sign-up, or app install. 'Total Visitors' is the number of unique sessions or users exposed to the opportunity. A higher conversion rate means your messaging, design, and targeting are well aligned with audience intent. Even small improvements have outsized revenue impact — raising conversion rate from 2% to 3% on 10,000 monthly visitors adds 100 extra conversions without spending more on traffic.
How to use
Imagine your product landing page received 4,500 visitors last week and 135 of them completed a purchase. Apply the formula: Conversion Rate = (135 / 4,500) × 100 = 3.0%. That 3% baseline now becomes your benchmark. Run an A/B test changing the call-to-action button color; the variant page gets 4,500 visitors and 162 purchases. New rate = (162 / 4,500) × 100 = 3.6% — a 0.6 percentage-point lift that translates directly into more revenue at zero extra ad cost.
Frequently asked questions
What is a good conversion rate for an e-commerce website?
Average e-commerce conversion rates typically fall between 1% and 4%, with top-performing stores reaching 5% or higher depending on the niche and traffic source. Luxury goods and high-ticket items often see lower rates because the buying decision takes longer, while impulse-buy categories can see rates well above average. Conversion rate also varies significantly by device — desktop tends to convert higher than mobile for most categories. Rather than chasing an industry average, focus on consistently beating your own historical baseline.
How is conversion rate different from click-through rate?
Click-through rate (CTR) measures how often someone clicks a link or ad relative to how many times it was shown, while conversion rate measures how many of those who arrive at the destination complete the target action. CTR lives at the top of the funnel — it tells you whether your creative or headline is compelling enough to earn a click. Conversion rate lives deeper in the funnel — it tells you whether your landing page or offer closes the deal. Both metrics work together: high CTR with low conversion rate often signals a mismatch between ad promise and page experience.
Why does my conversion rate fluctuate so much week over week?
Short-term conversion rate swings are usually caused by changes in traffic quality rather than changes in your page or offer. For example, a paid campaign targeting a broader, less-qualified audience will temporarily dilute your rate even if your page is performing well. Seasonality, day-of-week patterns, and promotional events also introduce natural variance. To get a reliable signal, ensure you have a statistically significant sample size before drawing conclusions — most A/B testing tools will flag when results are significant. Tracking conversion rate by traffic source separately helps isolate the real driver of any change.