A/B Testing Bandwidth Cost Calculator Examples
Review practical monthly A/B test bandwidth cost scenarios using different traffic volumes, allocations, payload sizes, and CDN prices.
These worked scenarios show how page views, traffic allocation, payload weight, and delivery pricing combine to create incremental A/B test bandwidth costs. The figures are illustrative estimates rather than provider billing forecasts.
Small website with a lightweight experiment
A content site receives 25,000 monthly visitors. Each visitor creates three eligible page views, and a 40 KB test payload is shown to 50% of traffic.
Input Summary
Monthly visitors
25,000
Eligible page views per visitor
3
Test allocation
50%
Additional payload
40 KB
Bandwidth price
$0.08 per GB
Calculation Breakdown
- 1Eligible page views25,000 × 375,000
- 2Test exposures75,000 × 0.5037,500
- 3Extra data37,500 × 40 KB1,500,000 KB
- 4Bandwidth and cost1,500,000 ÷ 1,000,000 × $0.080.15 GB and $0.01
Result Summary
Bandwidth and cost
0.15 GB and $0.01
A/B Testing Bandwidth Cost Calculator
Estimated incremental bandwidth is 0.15 GB per month, with an estimated delivery cost of $0.01.
Growing ecommerce site with variant assets
An ecommerce site has 300,000 visitors, five eligible views each, a 30% allocation, and an extra 250 KB payload.
Input Summary
Monthly visitors
300,000
Eligible page views per visitor
5
Test allocation
30%
Additional payload
250 KB
Bandwidth price
$0.10 per GB
Calculation Breakdown
- 1Eligible page views300,000 × 51,500,000
- 2Test exposures1,500,000 × 0.30450,000
- 3Extra data450,000 × 250 KB112,500,000 KB
- 4Bandwidth and cost112,500,000 ÷ 1,000,000 × $0.10112.5 GB and $11.25
Result Summary
Bandwidth and cost
112.5 GB and $11.25
A/B Testing Bandwidth Cost Calculator
The estimated monthly experiment overhead is 112.5 GB and $11.25.
High-traffic full-rollout experiment
A platform receives 2,000,000 visitors per month, averages six eligible page views, allocates 100% of traffic, and adds 120 KB per exposure.
Input Summary
Monthly visitors
2,000,000
Eligible page views per visitor
6
Test allocation
100%
Additional payload
120 KB
Bandwidth price
$0.06 per GB
Calculation Breakdown
- 1Eligible page views2,000,000 × 612,000,000
- 2Test exposures12,000,000 × 1.0012,000,000
- 3Extra data12,000,000 × 120 KB1,440,000,000 KB
- 4Bandwidth and cost1,440,000,000 ÷ 1,000,000 × $0.061,440 GB and $86.40
Result Summary
Bandwidth and cost
1,440 GB and $86.40
A/B Testing Bandwidth Cost Calculator
The full-allocation experiment adds an estimated 1,440 GB per month at an estimated cost of $86.40.
Large media payload with limited allocation
A publisher has 800,000 visitors, four eligible views per visitor, a 10% allocation, and a 900 KB additional payload.
Input Summary
Monthly visitors
800,000
Eligible page views per visitor
4
Test allocation
10%
Additional payload
900 KB
Bandwidth price
$0.09 per GB
Calculation Breakdown
- 1Eligible page views800,000 × 43,200,000
- 2Test exposures3,200,000 × 0.10320,000
- 3Extra data320,000 × 900 KB288,000,000 KB
- 4Bandwidth and cost288,000,000 ÷ 1,000,000 × $0.09288 GB and $25.92
Result Summary
Bandwidth and cost
288 GB and $25.92
A/B Testing Bandwidth Cost Calculator
The experiment adds an estimated 288 GB per month and costs about $25.92.
How to Read Your Results
Monthly test exposures estimate page views that receive the additional experiment payload, not necessarily unique people.
Additional monthly bandwidth represents only the test-related transfer calculated from the entered payload size.
Monthly cost is an incremental estimate based on the entered per-GB price.
Annual cost simply extends the monthly estimate across 12 similar months.
Compare scenarios by changing one input at a time to see whether traffic, allocation, or payload size has the largest effect.
Assumptions & Important Notes
- Each stated payload is delivered once for every estimated experiment exposure.
- The inputs represent monthly averages rather than daily peaks.
- The rate per GB remains constant across the calculated usage.
- All data is converted using 1,000,000 KB per GB.
- Caching, compression, and free transfer allowances are not separately modeled.
Related Examples
Frequently Asked Questions
Which input has the largest effect on A/B test bandwidth cost?
The largest driver depends on the setup, but total exposures and payload size usually have the most direct effect because they are multiplied together.
Can a 10% allocation still create high bandwidth usage?
Yes. A large payload or a high number of eligible page views can produce significant transfer even at a limited allocation.
How can I model a staged experiment rollout?
Calculate each allocation period separately, then add the estimated costs for those periods based on their expected duration.
Should I enter compressed payload size?
Use the transferred size that best reflects what users download, if that is available from your network or performance measurement tools.
Why may an invoice not match these examples?
Provider pricing, caching, compression, regional delivery, billing tiers, included allowances, and actual exposure behavior can change billed usage.
Ready to calculate your own result?
Use the live calculator with your own inputs, timing, and preferences.