In the game you find the setting under Settings → General → Mouse → Sensitivity: Aim.
Conversion
CS2 to Valorant Sensitivity
In short: CS2 sens times 0.3143. 1.2 becomes 0.377. For your own value, just edit the sentence below.
How to set it in Valorant
What changes when you go from CS2 to Valorant
Valorant turns 3.18 times further per mouse count than CS2. That is why the number gets smaller while your mouse distance stays the same.
Valorant shows 3.3° less field of view than CS2 by default (103° against 106.26°). The picture looks a little tighter and movement on screen a little faster.
In Valorant you can enter up to 3 decimal places. Use all of them to keep the conversion exact.
Common questions
How do I convert CS2 sens to Valorant?
Multiply your CS2 sens by 0.3143. 1.2 in CS2 becomes 0.377 in Valorant.
Where do I set the sens in Valorant?
Settings → General → Mouse → Sensitivity: Aim.
Why does Valorant still feel a bit different?
Both games have a fixed field of view: CS2 90° at 4:3, about 106° at 16:9, Valorant 103° horizontal. With the same mouse distance, the game with the smaller field of view can feel a bit faster.
Does this also apply to scopes?
No. The values are for hipfire. Zoom and scope sensitivities are set separately in the game.
Should I change my DPI?
No. Keep your DPI and only change the sens in the game. That keeps your feel the same everywhere.