How much traffic do I need?
Practical guidelines for test duration, sample sizes, and low-traffic strategy.
A/B testing needs enough volume for a reliable read.
Practical minimums
Aim for:
100–200 unique visitors per group.
20+ conversions per group.
For a 2-variant 50/50 test, that’s roughly 200–400 total visitors to hit the minimum bar.
How long will that take?
It depends on traffic and split.
If a page gets 100 visitors/day, each group gets ~50/day.
You reach 200/group in ~4 days.
Still run 1–2 full weeks to cover daily variation.
If a page gets 20 visitors/day, it takes ~20 days just to reach 200/group.
Expect multi-week tests.
Low-traffic strategies
If traffic is modest:
Test your highest-traffic pages.
Use fewer groups (50/50 splits are fastest).
When testing might not be practical
If your store gets <500 visitors/month, tests will be slow.
At that level:
Use qualitative research first (surveys, recordings, competitor analysis).
Reserve A/B tests for big decisions (like major pricing changes).
