A/B test sample size calculator
Work out how many visitors per variant a test needs, and how long that takes at your traffic level.
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Frequently asked questions
Is A/B test sample size calculator free?
Yes. A/B test sample size calculator is free to use and needs no account. A fair-use rate limit applies per address so the tool stays available for everyone.
What does A/B test sample size calculator do?
Work out how many visitors per variant a test needs, and how long that takes at your traffic level.. It is one of the free analytics tools ShortFreeURL publishes; the full list is on the tools page.
Do I need to sign up or install anything?
No. Open the page and use it. An account is only needed if you want to keep, edit or measure the links you create — that is what the ShortFreeURL dashboard is for.
Can I use it on a phone?
Yes. Every tool on the site works in a mobile browser as well as on a desktop.