Degrees per mouse count
L4D20.022°
CS:Source0.022°
Both games turn 0.022° per count, so the same sensitivity gives the same turn.
L4D2 to CS:Source Sensitivity
CS:Source sensitivity =
L4D2 sensitivity × 1
Both games turn 0.022° per mouse count, so the same sensitivity at the same DPI gives the same turn.
Worked example · 800 DPI
L4D21.114
CS:Source1.114
46.64 cmper 360°, both games
18.36 inper 360°
891 → 891eDPI
Different value? Find it in the chart or let the Windows app read it from your game.
46.64 cm / 360°L4D2 1.114 = CS:Source 1.114 · 800 DPI
Conversion chart
L4D2 to CS:Source sensitivity chart
L4D2 values from 0.40 to 3.20, the CS:Source value with the same 360° distance, and how far you move the mouse for one full turn at 400, 800 and 1600 DPI.
| L4D2 | CS:Source | cm/360 · 400 DPI | cm/360 · 800 DPI | cm/360 · 1600 DPI |
|---|---|---|---|---|
| 0.40 | 0.400 | 259.77 | 129.89 | 64.94 |
| 0.60 | 0.600 | 173.18 | 86.59 | 43.30 |
| 0.80 | 0.800 | 129.89 | 64.94 | 32.47 |
| 1.00 | 1.000 | 103.91 | 51.95 | 25.98 |
| 1.11 | 1.114 | 93.28 | 46.64 | 23.32 |
| 1.20 | 1.200 | 86.59 | 43.30 | 21.65 |
| 1.40 | 1.400 | 74.22 | 37.11 | 18.56 |
| 1.60 | 1.600 | 64.94 | 32.47 | 16.24 |
| 1.80 | 1.800 | 57.73 | 28.86 | 14.43 |
| 2.00 | 2.000 | 51.95 | 25.98 | 12.99 |
| 2.20 | 2.200 | 47.23 | 23.62 | 11.81 |
| 2.40 | 2.400 | 43.30 | 21.65 | 10.82 |
| 2.60 | 2.600 | 39.97 | 19.98 | 9.99 |
| 2.80 | 2.800 | 37.11 | 18.56 | 9.28 |
| 3.00 | 3.000 | 34.64 | 17.32 | 8.66 |
| 3.20 | 3.200 | 32.47 | 16.24 | 8.12 |
How this conversion works
One multiplier from two yaw values
L4D2 → CS:Source
× 1
L4D2 turns 0.022° per mouse count at sensitivity 1. CS:Source turns 0.022°. The ratio of the two is the multiplier.
- CS:Source sensitivity
- CS:Source = L4D2 × 0.022 ÷ 0.0221.114 × 1 = 1.114
- Back to L4D2
- L4D2 = CS:Source × 0.022 ÷ 0.0221.114 × 1 = 1.114
- cm per 360°
- 2.54 × 360 ÷ (yaw × sens × DPI)914.4 ÷ (0.022 × 1.114 × 800) = 46.64 cm
- eDPI
- sensitivity × DPIL4D2 891, CS:Source 891 at 800 DPI. eDPI only compares players inside one game.
A length you can measure
360 ÷ (0.022 × 1.114) = 14,689 counts
14,689 ÷ 800 DPI = 18.36 in = 46.64 cm
Divide 360° by the angle per count to get counts per turn, then divide by DPI to get inches.
Other match methods
360° distance or monitor distance
The chart matches 360° distance, which does not depend on field of view. Monitor distance matching (0%, 56.25%, 75%, 100%) depends on the FOV you set in L4D2 and CS:Source. The TrueSens app reads your FOV and shows every method side by side.
TrueSens for Windows · free · open source
What this page can't do
This page is a reference chart. The parts that need your PC are in the free Windows app:
- Reads your current sensitivity from L4D2's config file, so you don't have to look it up.
- Writes 1.114 into CS:Source (config.cfg) and keeps a backup you can restore.
- Measures your real DPI. An 800 DPI mouse can really be 826, which changes your cm/360.
- Draws 46.64 cm at true size on your screen after a one-time bank-card calibration.
- Blind A/B feel test between your old feel and the converted CS:Source value.
"Open in TrueSens" starts the installed app with L4D2 1.114 → CS:Source already filled in (truesens://convert?from=left-4-dead-2&to=cs-source&sens=1.114). If nothing opens, install the app first. Windows 10 and 11, x64, no ads, no account.
Going the other way
CS:Source to L4D2 sensitivity
Use the same value. CS:Source 1.114 is L4D2 1.114.
Related charts
More L4D2 and CS:Source pairs
FAQ
L4D2 to CS:Source sensitivity questions
How do I convert L4D2 sensitivity to CS:Source?
Use the same value. L4D2 and CS:Source both turn 0.022° per mouse count, so L4D2 1.114 is CS:Source 1.114 at the same DPI.
What is 1.114 L4D2 sensitivity in CS:Source?
1.114 at any DPI. At 800 DPI both settings turn you 360° with 46.64 cm of mouse movement.
Does DPI change the L4D2 to CS:Source conversion?
No. The multiplier is the same at 400, 800 or 1600 DPI as long as you use the same DPI in both games. DPI only changes your cm/360.
Should I match 360 distance or monitor distance from L4D2 to CS:Source?
360 distance keeps full turns and flicks identical and does not depend on field of view, so the chart on this page uses it. Monitor distance matching depends on the FOV you play with; the TrueSens app reads it from your settings and gives you that value too.
How do I set my converted sensitivity in CS:Source?
Open the CS:Source console and enter sensitivity 1.114, or set it in the game's mouse settings. The free TrueSens app for Windows can write the value into the CS:Source config for you and keeps a backup.
How do I convert CS:Source sensitivity to L4D2?
Use the same value: CS:Source 1.114 is L4D2 1.114.