20 Best Free Online AB Test Calculator Websites

Here is a list of best free online AB test calculator websites.  AB test is a statistical significance test between two or more variants or variables. It is a form of an experiment that is performed to find out which variant of a product, web page, and user interface attracts more visitors. This test is usually performed after the change in a design of a product or website. It helps users find out whether the difference between the two variants is significant or not. If the result is significant, then it shows how much better one variant is compared to the second-best variant. If you also want to perform AB testing of two or more variants, then check out these AB test calculator websites.

Through most of these websites, users can perform the AB test calculations consisting of two or more variants. With each variant of the experiment, users also need to submit the number of visitor and conversions values. After performing the calculation, these websites show which variant is best and how much better it is than the next best variant. Some of these calculators also allow users to calculate the minimum sample size and optimum duration of the test or experiment. The process to perform AB test calculations is not that difficult. To help out novice users, I have included the necessary AB test calculation steps in the description of each website.

These websites also come with additional tools like  GMT Testing, Bayesian A/B-test Calculator, Event Surveys, and more. Go through the list to know more about these websites.

My Favorite Online AB Test Calculator Website:

abtestguide.com is my favorite website as it can perform both pre and post-AB test evaluations. Plus, it also shows whether an AB test result is significant or not.

abtestcalculator.com is another good website that shows which product or design is more liked by users. It also shows which is the best variant of all the tested ones.

You can also check out lists of best free Online Credit Card EMI Calculator, Online Growth Rate Calculator, and Online Exponential Growth Calculator websites.

Table of Contents:

Features/Website Names	Best Variant	Statistical Significance	Result Graphs	Confidence Pecentage of Result	Test more than two variants
abtestguide.com	✓	✓	x	✓	x
abtestcalculator.com	✓	x	✓	✓	x
neilpatel.com	✓	✓	x	✓	✓
surveymonkey.com	✓	✓	x	✓	x
vwo.com	✓	✓	x	x	x
abtasty.com	x	✓	x	✓	x
cxl.com	✓	✓	✓	x	✓
marketing.dynamicyield.com	✓	✓	✓	x	✓
optimizely.com	x	✓	x	x	x
nabler.com	x	x	x	✓	x
evolytics.com	x	✓	x	✓	x
convertize.com	✓	✓	✓	x	x
clevertap.com	✓	x	x	✓	x
exponea.com	✓	✓	x	✓	x
websiteplanet.com	✓	✓	x	✓	✓
adwordsrobot.com	✓	x	x	✓	✓
webtrends-optimize.com	x	✓	x	x	✓
voxco.com	x	✓	x	✓	x
convert.com	✓	✓	x	✓	✓
omnicalculator.com	x	x	x	✓	x

abtestguide.com

abtestguide.com is a free online AB test calculator website. This website offers an AB test guide that helps users find out if their AB test results are significant or not and does the test have enough power. Plus, it is capable of performing both the pre and post-test evaluations. Although to perform AB test calculations, users need to use its post-test evaluation.

To perform the test, users need to enter two test data consisting of the number of Visitors A, Conversions A, Visitors B, and Conversions B. Besides this, it also lets users specify the Hypothesis and Confidence level before starting the test. According to the input values, it shows a graph highlighting the expected distributions of variations A and B. A significant test result is also generated that highlights which variant observed better conversions and how much confident you can be on the obtained result. Now, follow the below steps.

How to perform AB test calculations online using abtestguide.com:

• Visit this website and choose the Post-test evaluation (Test evaluation) option.
• After that, enter the Test data of two variants (A and B).
• Next, specify the Hypothesis (one-sided or two-sided) and Confidence level (90, 95, or 99).
• Lastly, click on the Apply changes to view the AB test graph along with the significant result.

Additional Features:

• This website also offers additional tools like GMT Testing, Bayesian A/B-test Calculator, A/B test size calculator, and more.

Final Thoughts:

It is one of the best free online AB test calculator websites that not only generated the primary significant result but also generates an expected distribution of variation A and B graph.

abtestcalculator.com

abtestcalculator.com is another free online AB test calculator website. It is another good website that helps users find out which variant of a product or website is more liked by the users. It also shows how much better one variant is compared to another variant. Plus, it also shows the conversion rate distributions and Improvement Distribution graphs. Now, follow the below steps.

How to perform AB test calculations online using abtestcalculator.com:

• Visit this website using the given link.
• After that, enter the number of participants and conversions of both variations A and B.
• Next, start the calculation to view which variant is better than the other along with the confidence percentage of the result.

Final Thoughts:

It is a simple and effective online AB test calculation website that shows detailed results along with a conversion rate distribution graph.

neilpatel.com

neilpatel.com is another free online AB calculator website. Through this website, users can quickly test if a change in product design or website design impacted their sales or not. To do that, this website uses pre and post-change numbers of visitors and conversion rates. According to the provided values, it finds the significance and shows it to users. Some of the data that it shows are how much better one variant of the test compared to another variant in percentage. It also lets users add more than two variants in the testing, unlike most other similar websites. Now, follow the below steps.

How to perform AB test calculations online using neilpatel.com:

• Visit this website and open up the A/B Testing Significance Calculator.
• After that, enter the number of visitors and their conversion rate values of two or more variants.
• Next, let this website perform the calculation and view which variant is better than the next best one in percentage.

Additional Features:

• This website also shows blogs and tools associated with SEO like SEO Analyzer, Backlinks Checker, AI Paragraph Rewriter, and more.

Final Thoughts:

It is another good online AB calculator website that lets users perform A/B significance test calculations for two and more test variants.

surveymonkey.com

surveymonkey.com is a free online AB test calculator website. Using this website, users can calculate the statistical significance of AB testing. It not only calculates the conversion rate but also shows the difference between two sets of conversion rate tests. Plus, it can also consider the Hypothesis ( one-sized, two-sided, and both) and the Confidence level (90%, 95, and 99%) of users in the AB testing. After performing the test, it shows which variant of the test has a higher conversion rate and will perform better. Now, follow the below steps.

How to perform AB test calculations online using surveymonkey.com:

• Visit this website using the given link.
• After that, enter the number of visitors and known conversions values in both A and B variants of the test.
• Now, specify the Hypotheses and Confidence level.
• Lastly, click on the Calculate button to view which variant will perform better and how much better it has performed in the current test.

Additional Features:

• This website also answers questions related to statistical significance.
• This website also offers various survey-related tools and solutions like Employee Engagement, Job Satisfaction, HR Surveys, Event Surveys, and more.

Final Thoughts:

It is a good online AB test calculator website through which users can perform AB calculations to find out which version of a test has more significance.

vwo.com

vwo.com is another free online AB test calculator website. This website helps users find out the difference between the two variants of the result is significant enough or not. Besides this, it also shows the exact P-value. It also shows smart stats like conversion rate in percentage, improvement, probability to be best, absolute potential loss, etc. Plus, probability density and box plot graphs based on the results are also provided. Now, follow the below steps.

How to perform AB test calculations online using vwo.com:

• Launch this website and open up the A/B split test significance calculator.
• After that, enter the number of visitors and number of conversions values of both control and variation test variants.
• Next, click on the Calculate Significance button to view the AB test results.

Additional Features:

• This website also offers solutions for eCommerce, SaaS, eLearning, Enterprises, etc., fields.

Final Thoughts:

It is another good online AB test calculator website that anyone can use to quickly perform AB test calculations.

abtasty.com

abtasty.com is another free online AB test calculator website. This website comes with a dedicated A/B test calculator. Unlike other similar A/B test calculators, it is used to calculate the minimum sample size and the ideal duration of A/B tests considering the number of audiences, number of conversions, etc., parameters. After performing the calculation, it shows the number of visitors you need per variation for accurate results. Now, follow the below steps.

How to perform AB test calculations online using abtasty.com:

• Go to this website and access the A/B test calculator.
• After that, enter the conversion rate percentage, minimum detectable effect, statistical significance, and statistical power values.
• Lastly, view the final value (number of users needed).

Additional Features:

• This website also offers additional tools like minimum detectable effect calculator, test duration calculation, etc.

Final Thoughts:

It is another good online AB test calculator that helps users calculate the minimum number of visitors per variant they need to achieve an accurate result.

cxl.com

cxl.com is another free online AB test calculator website. Using this website, users can perform both Pre and Post-test analyses. Although to perform the AB testing, users only need its Post Test analysis tool. This tool requires test duration, percent of traffic in the test, and two or more variants with their number of users and conversion values. In the result, it shows the probability of which variant to be the winner along with the probability density graph of all the added variants. Now, follow the below steps.

How to perform Ab test calculations online using cxl.com:

• Visit this website using the provided link and choose the Test Analysis (Post Test Analysis) option.
• Next, enter the test duration and test variants information in the given fields.
• Now, view the final results in the Results section highlighting which variant is the best one along with probability density and probability of eight winner graphs.

Additional Features:

• This website also shows additional test statistics calculators like sample size calculator, duration calculator, minimal detectable effect calculator, etc.

Final Thoughts:

It is another good online AB test calculator website through which users can perform both pre and post-test analysis calculations.

marketing.dynamicyield.com

marketing.dynamicyield.com is another free online AB test calculator website. This website offers a bayesian A/B testing calculator. Using it, users can test two or more variants and find out which variant is statistically significant. It also generates intuitive graphs to highlight the difference between all the entered variants. Now, follow the below steps.

How to perform AB test calculations online using marketing.dynamicyield.com:

• Launch this website using the given link.
• After that, add variants that you want to test.
• next, enter the number of samples and conversions of each variant.
• Lastly, view the calculated winner variant along with the Posterior simulation of the difference graph.

Additional Features:

• This website also shows offers recommended reading material associated with A/B testing like power of Bayesian A/B testing, How Not To Run An A/B Test, Bayesian A/B Test Duration, and more.

Final Thoughts:

It is one of the simplest online AB test calculator websites that also support AB test calculations for more than two variants.

optimizely.com

optimizely.com is another free online AB test calculator website. This website allows users to calculate A/B test sample size. To do that, it uses a base conversion rate and minimum detectable effect values. In the calculation, users can also include the statistical significance value between 80 and 99 percent. After performing the calculation, it shows the sample size per variation value. Now, follow the below steps.

How to perform AB test sample size calculation using optimizely.com:

• Launch this website and access the A/B test sample size.
• After that, enter the baseline conversion rate and minimum detectable effect value.
• Next, specify the statistical significance value.
• Lastly, view the calculated sample size per variation value.

Additional Features:

• This website also gives answers related to sample size and A/B test calculations topic.
• This website also offers online tools like marketing planning, content management, feature management, commerce, and more.

Final Thoughts:

It is another capable online AB test calculator through which users can find A/B test sample sizes.

nabler.com

nabler.com is another free online AB test calculator website. This website is designed to calculate how long you should run an A/B test. To find out the optimal A/B test run duration, this website requires 5 known parameters namely existing conversion rate, minimum detectable effect, number of variations, average daily visitors, and visitors included in the test. In the final result, it shows the duration for which you should run the test with 95 percent confidence. Now, check out the below steps.

How to perform AB test calculations online using nabler.com:

• Visit this website and access the A/B Test Duration Calculator.
• After that, enter the values of all five known parameters as mentioned above.
• Next, click on the Calculate button to view the optimal days for which you should run an A/B test.

Additional Features:

• This website also offers solutions for fields like Data Science, Data Engineering, Google Analytics Training, Adobe Analytics, and more.

Final Thoughts:

It is another simple-to-use online AB test calculator through which users can calculate for how long they should run an A/B test.

evolytics.com

evolytics.com is yet another free online AB test calculator website. Through this website, users can calculate the statistical significance of the A/B test. It can test and compare two variants using their sample size and response percentage. After the test, it shows the raw percentage and variant recipe response rate with 95 percent confidence. It also shows whether the difference between the two variants is significant enough or not. Now, check out the below steps.

How to perform AB test calculations online using evolytics.com:

• Launch this website using the provided link.
• After that, enter the sample size and response percentage values of both variants.
• Next, click on the Calculate button to view the difference between variants are significant enough or not along with raw difference, index to control, etc., values.

Additional Features:

• This website also offers additional online calculators like Chi Square Calculator, Sample Size Calculator, Z-Score to Confidence Calculator, and more.

Final Thoughts:

It is another good online AB test calculator website through which users can find out the difference between two variants and whether the difference between variants is significant enough or not.

convertize.com

convertize.com is a free online AB test calculator website. Using this website users can quickly perform the AB tests and find out their significance. It also explains the meaning of the Ab test results to help out users. To perform the test, users need to enter the known Traffic and Coinversion values of both variants (Variation A and Variation B). Besides this, users can also specify the confidence level of the test which can be varied between 90 and 99 percent. Now, follow the below steps.

How to perform AB test calculations online using convertize.com:

• Visit this website and go to the A/B Testing section.
• Now, submit the Traffic and Conversion values of Variation A and Variation B sections.
• Next, specify the Confidence Level of the test.
• Lastly, click on the Calculate button to view the difference between variations and their significance level. A conversion rate graph highlighting the differences between both variations is also generated.

Final Thoughts:

It is another good online AB test calculation website that anyone can use without much hassle.

clevertap.com

clevertap.com is another free online AB test calculator website. Using this website, users can calculate the ideal sample size for each variant and find out the winning variant between the two tested ones. To find out the sample size, it uses the known conversion rate, error rate, and confidence level. To find out the winning variant, it requires the sample size and conversion numbers of both variants. Now, follow the below steps.

How to perform AB test calculations online using clevertap.com:

• Visit this website and go to the Step III: Choosing the winning variant section.
• After that, submit the sample size and conversion rates of both Variant A and Variant B.
• As soon as you enter the required values, it performs the calculations and shows which variant is the winner with 95 to 99 percent confidence.

Additional Features:

• On this website, users can also find additional products like cross-channel messaging, campaign optimization, journey orchestration, behavioral analytics, and more.

Final Thoughts:

It is a good AB test calculation website that can find out the winner variant along with the ideal sample size of each variant.

exponea.com

exponea.com is another free online AB test calculator website. Using this website, users can find out if the AB test result is significant or not. It lets users include two variations in their AB test. In both variations, users need to input their Audience and Conversion Numbers. According to the resultant conversion rate, this website shows how much better one variation is compared to the other one. Now, check out the below steps.

How to perform AB test calculations online exponea.com:

• Visit this website using the given link.
• After that, enter the Audience and Conversion numbers in both variations.
• Lastly, let this website perform the calculation to view the significance of the AB test.

Additional Features:

• This website also offers CDP, Campaigns, and CDXP online products and services.

Final Thoughts:

It is another good AB test website to quickly find out the significance of the performed AB test.

websiteplanet.com

websiteplanet.com is another free online AB test website. This website offers a simple statistical significance A/B test calculator. It can perform the calculation for two and more variants like Variant A, Variant B, variant C, and more. It also shows if the performed test is statistically significant or not. Plus, it shows which variant is the most optimal and how much better it is compared to other variants. In addition to that, it also generates conversion rates for each variant graph. Now, follow the below steps.

How to perform AB test calculations online websuteplanet.com:

• Visit this website and access the A/B test calculator.
• After that, add any number of variants that you want.
• Next, specify the number of visitors and overall conversions of each added variant,
• Lastly, click on the Calculate button to view the statistically significant values and conversion rates of each variant bar graph.

Additional Features:

• This website also provides the steps to properly run AB test on this website.
• This website also contains additional online tools like QR Code generator, Domain Expiration Checker, Multiple URL Opener, and more.

Final Thoughts:

It is another capable online AB test website that calculates the statistical significance of the AB test and how much better one variant is compared to the next best one.

adwordsrobot.com

adwordsrobot.com is another free online AB test website. This website helps users find out the best variant from all the available ones. It also shows how much better the best variant to the second best one. It also shows the confidence associated with the result that it shows. Another good thing about this website is its ability to support more than two variants. Now, follow the below steps.

How to perform AB test calculations online using adwordsrobot.com:

• Launch this website using the given link.
• After that, enter the number of visits and conversion numbers of all the variants.
• Lastly, click on the Calculate winning variant button to view which variant is best.

Final Thoughts:

It is one of the simplest online AB testing websites that help users find out the best variant from various available ones.

webtrends-optimize.com

webtrends-optimize.com is another free online AB test website. This website offers a dedicated AB testing calculator that can find out whether your results are statistically significant or not. Plus, it also lets users add more than two variants. It also lets users specify the confidence level, duration of the test, conversion value, and percentage of traffic tested values before starting the AB test. After performing the test, it shows the statistical significance along with the best variant. Now, follow the below steps.

How to perform AB calculation tests online using webtrends-optimize.com:

• Visit this website using the provided link.
• After that, enter the confidence level, test duration, conversion value, and percentage of traffic tested values,
• Now, enter the number of visitors and conversion numbers of all the added variants.
• Lastly, click on the Calculate Significance button to view the detailed result.

Additional Features:

• This website also offers online website optimization, market-leading platform, split testing, baseline analysis, etc., solution and test tools.

Final Thoughts:

It is another good online AB test website that anyone can use without much hassle.

voxco.com

voxco.com is another free online AB test website. This website comes with a simple AB test calculator that uses two variants to perform the AB testing. In the test, users can also specify the conversion rate limits percentage (90%, 95%, or 99%). After the calculation, it shows the significance of the result, Z-score, P-value, and conversion rate limits. Now, follow the below steps.

How to perform AB test calculations online using vocvo.com:

• Go to this website and submit the numbers of visitors and conversion numbers of both the input variants.
• Now, specify the confidence percentage.
• Next, click on the Calculate button to view the best variant.

Additional Features:

• This website also offers solutions for various industries like banking, Enterprise, Government, Insurance, Retail, and more.
• It also offers online products like survey software, online survey tool, CATI Survey, Voxco Dialer, etc.

Final Thoughts:

It is another simple-to-use online AB test calculator website that anyone can use with ease.

convert.com

convert.com is another free online AB test website. Through this website, users can perform A/B statistical tests to find out the best variant. Plus, it lets users include more than two variants in the A/B statistical testing. After the test, it shows detailed test result that includes relative effect size, P-Value, Observed Power, and Control vs Variant Density Plots. Now, follow the below steps.

How to perform AB test calculations online using convert.com:

• Visit this website and access the A/B Statistical Calculator.
• After that, add two or more variants.
• next, enter the visitors and conversion values of all the added variants.
• Next, click on the Compute button to view the detailed AB test result including the best variant.

Additional Features:

• This website can also be used to perform Split Testing, Multivariate Testing, and Multipage Experiments.

Final Thoughts:

It is another good online AB test calculation website that anyone can use to quickly to view detailed results of AB tests.

omnicalculator.com

omnicalculator.com is a free online AB test website. Using this website users can perform AB calculation tests between two variants. Plus, it also provides a detailed explanation of the AB calculation test along with examples and formulas. Like other similar websites, it also needs the sample size and number of positive results as input of both variants. The final result shows Z-score, Confidence Level, and Alpha level’s z-score. Now, follow the below steps.

How to perform AB test calculation online using omnicalculator.com:

• Go to this website and access the AB Test Calculator.
• After that, enter the sample size and number of positive results values in both variants (Group 1 and Group 2).
• Lastly, view all the test results in the Results section.

Additional Features:

• This website also offers additional online calculators such as Continuity Correction, Confidence Interval, Coefficient of determination, and more.

Final Thoughts:

It is another good online AB test website that offers all the tools to quickly perform an AB test consisting of two variants.