Mouse DPI Calculator
Physically move the mouse across a known distance on your pad. Enter that distance — we divide total pointer pixels by inches moved.
Hold click and drag; release when done.
Pixels sampled
0
How to use
- Measure tab: Drag in a straight line across a known physical distance on your desk or pad (use a ruler).
- Enter that distance and unit (inches or centimeters), then read the estimated DPI from pointer travel.
- Convert tab: Enter current DPI and current in-game sensitivity.
- Enter your new mouse DPI.
- Apply the suggested new in-game sensitivity so effective DPI (eDPI) stays approximately constant.
FAQ
Is measured DPI exact?
It is an estimate based on browser pointer movement and your entered physical distance.
Why preserve eDPI?
Keeping eDPI constant maintains similar aim feel when switching hardware DPI.
Introduction
Mouse DPI Calculator has two flows: estimate DPI from a measured drag, and compute a new in-game sensitivity when you change DPI but want the same eDPI.
Purpose
- Approximate DPI when the exact hardware step is unknown.
- When you buy a mouse with a different native step, keep familiar aim feel via eDPI-preserving conversion.
Key Features
- Measure tab: estimate DPI from pointer travel + a ruler-measured physical drag.
- Convert tab: keep eDPI when you change mouse DPI by suggesting new in-game sensitivity.
Common Use Cases
- Unknown DPI on a new mouse; you only know you moved 10 cm.
- Switching from 800 to 1600 DPI while keeping the same effective sensitivity.
Best Practices
- Measure on a flat edge or printed ruler; crooked drifts skew the estimate.
- Re-run measure if you change surface, lift-off distance, or OS pointer scaling.
Comparison metrics
| Metric | Meaning |
|---|---|
| Estimated DPI | Compare before/after or two mice using the same ruler distance and drag path. |
| eDPI match | After conversion, old DPI × old sens should match new DPI × new sens within rounding. |