Most A/B tests are stopped at the moment they look good, which is exactly when they mean least. This gives the number of visitors to wait for, decided before the test starts.
A/B test sample size calculator
How many visitors each variant needs before a difference means anything, from your current rate and the improvement worth detecting.
Visitors per variant
7,600
Total visitors
15,200
Days to run
30.4
Weeks to run
4.34
يُحتسب فورًا في متصفحك · لا يتم إرسال أي بيانات
كيف تعمل
- 1Enter the rate you convert at today.
- 2Decide the smallest improvement worth acting on.
- 3Read the duration, then commit to it before starting.
لمن هذه الأداة
- •Planning a landing page test
- •Deciding whether a test is even feasible
- •Settling an argument about a winner
نصائح احترافية
- A 60/40 split over thirty visitors is noise, and acting on it costs months.
- This is the usual approximation at 95 percent confidence and 80 percent power. It sizes a test; it does not replace a statistician.
أدوات ذات صلة
Conversion rate calculator
Conversion rate, revenue per visitor, and what the rest of the traffic was worth.
Ad budget calculator
The budget needed to win a number of customers, from your conversion rate and click cost.
ROI calculator, free
Return on investment from what you spent and what came back: the ratio, the net gain, and how long the spend took to pay for itself.
هل تحتاج إلى أكثر من هذه الأداة؟
يجمع Kiwi بين إدارة العملاء والفوترة والحملات ووكلاء الذكاء الاصطناعي والأدوات الإبداعية في لوحة تحكم واحدة. 30 رصيدًا مجانيًا، دون الحاجة إلى بطاقة ائتمان.