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Gaming Frame Rate Per-User Formula

Learn how to calculate FPS capacity per concurrent user, the per-user difference, and frame-rate uplift between gaming A/B test variants.

This calculation normalizes each variant's total frame-rate capacity by its concurrent users. It helps compare test variants fairly when the variants have different player counts as well as different total capacity.

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Frame-Rate Uplift per User

Uplift = ((FPS_B / Users_B) − (FPS_A / Users_A)) / (FPS_A / Users_A) × 100

Where:

First divide each variant's total FPS capacity by its concurrent users. Then compare Variant B's per-user result with Variant A's per-user result as a percentage of Variant A.

Variables Explained

VariableWhat It MeansUnit
FPS_A - Variant A total frame-rate capacityThe combined frame-rate capacity measured for Variant A during the comparable test period.FPS
Users_A - Variant A concurrent usersThe number of players concurrently sharing Variant A capacity.users
FPS_B - Variant B total frame-rate capacityThe combined frame-rate capacity measured for Variant B during the comparable test period.FPS
Users_B - Variant B concurrent usersThe number of players concurrently sharing Variant B capacity.users

Step-by-Step Calculation

1

Calculate Variant A FPS per user

Divide Variant A's total FPS capacity by its concurrent users.

variantAFpsPerUser = variantATotalFps / variantAUsers

2

Calculate Variant B FPS per user

Divide Variant B's total FPS capacity by its concurrent users.

variantBFpsPerUser = variantBTotalFps / variantBUsers

3

Find the absolute per-user difference

Subtract Variant A's per-user FPS from Variant B's. A positive value favors Variant B.

fpsDifference = variantBFpsPerUser - variantAFpsPerUser

4

Calculate the percentage uplift

Express the FPS difference relative to Variant A's per-user FPS baseline.

fpsUplift = (fpsDifference / variantAFpsPerUser) * 100

Equal-size gaming test groups

Variant A total frame-rate capacity120,000 FPS
Variant A concurrent users1,000 users
Variant B total frame-rate capacity132,000 FPS
Variant B concurrent users1,000 users
1

Variant A FPS per user

120000 / 1000

120 FPS per user

2

Variant B FPS per user

132000 / 1000

132 FPS per user

3

FPS difference per user

132 - 120

12 FPS per user

4

Frame-rate uplift

(12 / 120) * 100

10%

Final Result

Variant B provides an estimated 132 FPS per user versus 120 FPS for Variant A: a 12 FPS per-user difference and 10% uplift.

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Assumptions

  • ✓Total frame-rate capacity is measured consistently for both variants under comparable conditions.
  • ✓Concurrent users are counted using the same definition and time window in both variants.
  • ✓Available capacity is treated as evenly shared across concurrent users.
  • ✓The baseline Variant A FPS per user is greater than zero.

Limitations

  • !Per-user FPS capacity is a normalized estimate, not necessarily a player's measured device FPS.
  • !The calculation does not account for frame-time consistency, input latency, network conditions, graphics settings, or device hardware.
  • !Uneven player activity or workload can make equal-sharing assumptions inaccurate.
  • !A percentage uplift alone does not establish statistical significance or player-experience impact.

Common Mistakes to Avoid

1

Using total test participants instead of the users active at the same time.

2

Comparing FPS capacity captured with different game builds, settings, regions, or measurement windows.

3

Treating total FPS capacity as an individual player's observed frame rate.

4

Ignoring different workload mixes between variants.

5

Reading a positive uplift as proof of smoother gameplay without checking frame pacing and latency.

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Frequently Asked Questions

How is FPS per user calculated?

Divide a variant's total frame-rate capacity by the number of concurrent users assigned to that variant.

How do you calculate frame-rate uplift between A/B variants?

Subtract Variant A FPS per user from Variant B FPS per user, then divide the difference by Variant A FPS per user and multiply by 100.

Can Variant A and Variant B have different numbers of users?

Yes. Each variant is normalized separately, so the calculation can compare per-user capacity across different group sizes.

What does a negative FPS difference mean?

It means Variant B has lower estimated FPS capacity per concurrent user than Variant A under the entered conditions.

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