In the game you find the setting under Settings → Keyboard/Mouse → Mouse Sensitivity.
The quicker way is the console: sensitivity 1.515
Conversion
In short: Fortnite sens times 0.2525. 6% becomes 1.515. For your own value, just edit the sentence below.
In the game you find the setting under Settings → Keyboard/Mouse → Mouse Sensitivity.
The quicker way is the console: sensitivity 1.515
CS2 turns 3.96 times further per mouse count than Fortnite. That is why the number gets smaller while your mouse distance stays the same.
CS2 shows 26.3° more field of view than Fortnite by default (106.26° against 80°). The picture looks a little wider and movement on screen a little slower.
In CS2 you can enter up to 3 decimal places. Use all of them to keep the conversion exact.
How far you move the mouse for a full turn, depending on your Fortnite sens and DPI. In CS2 the distance stays the same with the converted value.
| Fortnite sens | 400 DPI | 800 DPI | 1600 DPI | CS2 sens |
|---|---|---|---|---|
| 4% | 102.9 cm | 51.4 cm | 25.7 cm | 1.01 |
| 5% | 82.3 cm | 41.1 cm | 20.6 cm | 1.263 |
| 6% | 68.6 cm | 34.3 cm | 17.1 cm | 1.515 |
| 7% | 58.8 cm | 29.4 cm | 14.7 cm | 1.768 |
| 8% | 51.4 cm | 25.7 cm | 12.9 cm | 2.02 |
| 10% | 41.1 cm | 20.6 cm | 10.3 cm | 2.525 |
Your own values? The cm/360 calculator also works backwards.
Multiply your Fortnite sens by 0.2525. 6% in Fortnite becomes 1.515 in CS2.
Settings → Keyboard/Mouse → Mouse Sensitivity. Or in the console: sensitivity 1.515.
Fortnite: Default 80°, check in the game whether you changed it. CS2: 90° at 4:3, about 106° at 16:9. Match the field of view as closely as you can; then the converted sens feels most natural.