Rainbow Six Siege

ADS Calculator

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Editorial note

A documented way to migrate a pre-Y5S3 ADS value

This calculator is for Rainbow Six Siege players returning to a setup recorded before Shadow Legacy. It converts the old single ADS slider into the eight per-optic values introduced in Y5S3. The equations and lookup values come from Ubisoft's migration guide, and each result is rounded to a value that can be entered in the advanced ADS menu.

This is deliberately narrower than a recommendation engine: it does not guess a perfect setup from one modern optic. The page explains which historical input is valid, how FOV and aspect ratio enter Ubisoft's equation, and how to verify the rounded result before overwriting a saved configuration.

Last reviewed: July 4, 2026

Use the correct legacy input

Enter the single ADS slider value you used before Y5S3. A value from a current per-optic slider is not the same input.

Verify in the firing range before queueing

Use a short drill of one-taps, horizontal flicks, and scope swaps to make sure the output feels stable before you commit to it.

Keep the source beside the result

Save the old ADS value, vertical FOV, aspect ratio, and converted table together so the migration remains reproducible.

How to run and verify the legacy conversion

  1. Enter the single ADS value you used before the Y5S3 Shadow Legacy change.
  2. Match your aspect ratio and vertical FOV. Console players should use a vertical FOV of 60.
  3. Copy the generated scope table and test it in a custom session or the firing range.
  4. Adjust only after testing the same drill twice; do not keep changing values every round.

What this tool is based on

The calculator implements Ubisoft's published Y5S3 equations for converting the old single ADS slider into Shadow Legacy per-optic values. It should be treated as a migration baseline that you validate in game, not as a general-purpose recommendation engine.

How we keep the calculator useful

Every sensitivity output on this site should be treated as a testable baseline. We document the assumptions behind the tools, explain where conversions can drift, and point players toward a repeatable in-game validation routine instead of promising a single best setting.

Calculation methodologyReview the formulas, assumptions, and known limits behind the tools.Site review processSee how the site is maintained and how corrections are handled.

Related resources for the next step

ADS math guideUnderstand the logic behind scope-to-scope changes before you edit your settings file.Sensitivity guideUse a full setup workflow if you are still deciding between arm-heavy and wrist-heavy aiming.Cross-game converterMove a trusted setup in or out of Siege when you are training across CS2, VALORANT, Apex, or Tarkov.

Frequently asked questions

Which ADS value should I enter?
Enter your old single ADS slider value from before Y5S3. This is a legacy migration tool, not a converter from one current optic to every other optic.
Why does the calculator ask for aspect ratio and FOV?
Ubisoft’s published conversion first derives horizontal FOV from vertical FOV and aspect ratio. Aspect ratio changes the result only when that horizontal value would exceed the documented 150-degree cap.
Should I keep changing settings until the table feels right?
No. Use the calculated values as a baseline, run a repeatable drill, and only change one variable at a time. Most inconsistency comes from over-adjusting between matches, not from being one point away in a table.
What makes this site different from a generic sensitivity page?
This site is built around Rainbow Six Siege workflows: optic-by-optic ADS tuning, cross-checking scope transitions, and linking those outputs to broader setup guides instead of stopping at one result table.

Who this site is for

We built this site for players who care about repeatable settings, not for traffic pages written only to rank for a phrase. If you are testing a new FOV, rebuilding a setup after a patch, or bringing your sensitivity over from another shooter, the goal is to give you a cleaner process and better reference material, not to push you toward constant tweaking.