DPI Analyzer
Estimate your mouse DPI with a ruler-based, multi-trial browser test.
Free Mouse Tools
Nine free, no-signup tools for measuring and understanding your mouse. Everything runs in your browser — no downloads, no uploads.
DPI Deviation Test
Check sensor consistency across trials: per-trial DPI, standard deviation, CV%, verdict.
eDPI Calculator
Effective DPI = mouse DPI × in-game sensitivity, with per-game presets.
cm/360 Calculator
How much mouse movement makes a full 360° turn in your game.
Sensitivity Converter
Move sensitivity between games with matched cm/360. Formula shown.
Polling Rate Test
Estimate your mouse polling rate (Hz) — honest, browser-based estimate.
Double Click Test
Test for double-click issues: CPS, double-click count, interval stats.
CPS Test
Clicks-per-second test in 5s and 10s modes with live counter.
Mouse DPI Database
Native DPI steps, sensors, and polling rates for 44 popular mice.
Which tool do you need?
- Not sure of your DPI? Start with the DPI analyzer.
- Sensor feels inconsistent? Run the deviation test.
- Comparing game settings? Use the eDPI calculator, cm/360 calculator, and sensitivity converter.
- Checking hardware? The polling rate test, double-click test, and CPS test stress your mouse.
- Shopping for a mouse? Look up native DPI steps in the mouse DPI database.
Frequently asked questions
Are these tools really free?
Yes. Every tool on this page is free with no account, no download, and no usage limits.
Do these tools work on a phone or tablet?
The calculators and converters work on any device. The DPI analyzer, deviation test, polling rate test, and click tests require a physical mouse and do not work with touchscreens.
Do the tools upload my data anywhere?
No. All measurement and calculation happens in your browser. Session history is stored in your own browser's localStorage and can be cleared at any time.
How accurate are the measurements?
Measurements that touch hardware (DPI, polling rate) are estimates — browsers cannot read USB HID registers directly. We label every estimate as an estimate and explain the error sources.
Which tool should I use first?
If you don't know your mouse DPI, start with the DPI analyzer. If you're comparing settings between games, go straight to the sensitivity converter.
Do I need to install anything?
No. Everything runs in a modern browser. The DPI analyzer works best with Pointer Lock, which Chrome, Edge, Firefox, and Safari all support.