A/B Testing Screen Resolution Calculator Examples
Worked examples showing how screen-resolution traffic share, variation count, and visitor targets affect estimated A/B test duration.
These worked scenarios show how to estimate the available traffic for a screen-resolution segment and how long different A/B test setups may take. They are traffic estimates rather than conclusions about statistical significance.
High-traffic desktop resolution test
A retail site wants to test a product-page layout for visitors reported at 1920 × 1080.
Input Summary
Screen resolution
1920 × 1080
Total daily visitors
10,000 visitors/day
Resolution traffic share
18%
Number of variations
2
Target visitors per variation
1,000 visitors
Expected conversion rate
5%
Calculation Breakdown
- 1Find daily segment traffic10,000 × 18%1,800 visitors/day
- 2Split traffic1,800 ÷ 2900 visitors/day per variation
- 3Find total traffic needed1,000 × 22,000 visitors
- 4Estimate durationceil(2,000 ÷ 1,800)2 days
- 5Estimate conversion events1,000 × 5%50 conversions per variation
Result Summary
Estimate conversion events
50 conversions per variation
A/B Testing Screen Resolution Calculator
The test is estimated to need 2 days, with 900 daily segment visitors per variation and about 50 expected conversions per variation at the target.
Niche ultrawide monitor segment
A software company wants to compare dashboard navigation for visitors reported at 3440 × 1440.
Input Summary
Screen resolution
3440 × 1440
Total daily visitors
8,000 visitors/day
Resolution traffic share
3%
Number of variations
2
Target visitors per variation
1,500 visitors
Expected conversion rate
4%
Calculation Breakdown
- 1Find daily segment traffic8,000 × 3%240 visitors/day
- 2Split traffic240 ÷ 2120 visitors/day per variation
- 3Find total traffic needed1,500 × 23,000 visitors
- 4Estimate durationceil(3,000 ÷ 240)13 days
- 5Estimate conversion events1,500 × 4%60 conversions per variation
Result Summary
Estimate conversion events
60 conversions per variation
A/B Testing Screen Resolution Calculator
The ultrawide segment is estimated to require 13 days to deliver 1,500 visitors to each variation.
Three-variation tablet layout test
A publisher is comparing a control and two tablet navigation treatments for visitors reported at 1280 × 800.
Input Summary
Screen resolution
1280 × 800
Total daily visitors
15,000 visitors/day
Resolution traffic share
8%
Number of variations
3
Target visitors per variation
2,000 visitors
Expected conversion rate
2.5%
Calculation Breakdown
- 1Find daily segment traffic15,000 × 8%1,200 visitors/day
- 2Split traffic1,200 ÷ 3400 visitors/day per variation
- 3Find total traffic needed2,000 × 36,000 visitors
- 4Estimate durationceil(6,000 ÷ 1,200)5 days
- 5Estimate conversion events2,000 × 2.5%50 conversions per variation
Result Summary
Estimate conversion events
50 conversions per variation
A/B Testing Screen Resolution Calculator
The three-variation tablet test is estimated to take 5 days, with 400 selected-segment visitors per variation per day.
Low-volume mobile landscape segment
A travel site is testing a mobile landscape booking layout for visitors reported at 844 × 390.
Input Summary
Screen resolution
844 × 390
Total daily visitors
6,000 visitors/day
Resolution traffic share
2%
Number of variations
2
Target visitors per variation
1,200 visitors
Expected conversion rate
1%
Calculation Breakdown
- 1Find daily segment traffic6,000 × 2%120 visitors/day
- 2Split traffic120 ÷ 260 visitors/day per variation
- 3Find total traffic needed1,200 × 22,400 visitors
- 4Estimate durationceil(2,400 ÷ 120)20 days
- 5Estimate conversion events1,200 × 1%12 conversions per variation
Result Summary
Estimate conversion events
12 conversions per variation
A/B Testing Screen Resolution Calculator
The test reaches its visitor target in about 20 days, but it produces only about 12 expected conversions per variation.
How to Read Your Results
Daily resolution visitors show the estimated eligible traffic available from the selected screen-resolution segment.
Daily visitors per variation assumes an equal allocation across the control and all treatments.
Estimated duration is rounded up to a whole day and represents a planning estimate, not a required stopping point.
Total required segment visitors is the combined target across all variations.
Expected conversions per variation help indicate whether the visitor target may produce a useful volume of events.
Assumptions & Important Notes
- The selected segment's traffic share remains similar during the estimated period.
- Traffic is allocated equally across every listed variation.
- All visitors counted in the estimate are eligible to be exposed to the experiment.
- The expected conversion rate is representative of the selected segment.
Related Examples
Frequently Asked Questions
Why can a screen-resolution test take longer than a sitewide test?
Only visitors in the selected segment are included, so the available daily traffic is lower than total site traffic.
What happens if I test three variations instead of two?
Traffic is divided among three versions, and the combined visitor requirement becomes three times the target per variation.
Can I use a viewport segment instead of a reported screen resolution?
Yes. Use the segmentation definition that matches the data available in the testing platform and the responsive behavior being evaluated.
Why do expected conversions matter in these examples?
Visitor volume and conversion-event volume are different. A low conversion rate can leave each version with few observed conversion events.
Should I round the estimated duration down?
No. Rounding upward avoids understating the number of calendar days needed to reach the stated traffic target.
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