In the game you find the setting under Options → Controls → General → Sensitivity.
Conversion
Valorant to Overwatch 2 Sensitivity
In short: Valorant sens times 10.6061. 0.3 becomes 3.18. For your own value, just edit the sentence below.
How to set it in Overwatch 2
What changes when you go from Valorant to Overwatch 2
Valorant turns 10.61 times further per mouse count than Overwatch 2. That is why the number gets bigger while your mouse distance stays the same.
The default field of view is almost the same: Valorant 103°, Overwatch 2 103° horizontal. The picture feels alike.
In Overwatch 2 you can enter up to 2 decimal places. Use all of them to keep the conversion exact.
Common questions
How do I convert Valorant sens to Overwatch 2?
Multiply your Valorant sens by 10.6061. 0.3 in Valorant becomes 3.18 in Overwatch 2.
Where do I set the sens in Overwatch 2?
Options → Controls → General → Sensitivity.
Why does Overwatch 2 still feel a bit different?
Valorant: 103° horizontal. Overwatch 2: Slider from 80° to 103°. Match the field of view as closely as you can; then the converted sens feels most natural.
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.