Gaming mouse with an adjustable DPI button
A DPI button lets you step through stages and test each one.
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Mouse DPI Test: Check Your Real DPI
Mice do not always report exactly the DPI printed on the software slider. Mark a distance with a ruler, move the mouse along it, and see the DPI your sensor actually sends.
Before you start: lay a ruler on your mouse pad and mark a distance, such as 10 cm. Enter it below, click the box, move the mouse exactly that far in a straight line, then click again.
Click here to start
Counts 0 · Measured – DPI · Nearest common setting –
Turn off any pointer acceleration first, and keep the mouse on the same DPI stage while you measure.
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Quick answer
Enter the distance you will move (10 cm works well), click the box, move the mouse that far in a straight line and click again. DPI is the counts divided by inches. Repeat three times and compare, because small errors in your hand add up.
How to use the Mouse DPI Test
Mark a distance
Lay a ruler on your pad. 10 cm is long enough to average out small errors. Type the distance into the box.
Move and count
Click the box, slide the mouse the full distance in a straight line, then click to stop. The page counts raw movement.
Compare and repeat
Read the DPI and the nearest common setting. Run it three times and use the middle value.
How the mouse DPI test works
DPI means dots (counts) per inch. When you move the mouse one inch, the sensor reports that many counts. The test locks the pointer to the box and adds up the horizontal counts the browser reports, then divides by the distance you moved, converted to inches (cm divided by 2.54).
Chrome and Edge can ask for unadjusted movement, which skips the operating system's pointer acceleration, so the counts match what the sensor sent. Other browsers may only give adjusted movement; the result is then marked and can be off. The test cannot see the DPI setting itself, only what it does when you move the mouse.
Common DPI settings
Higher DPI does not mean better aim. It only changes how far the cursor moves per inch. Many players pick 400 to 1600 and tune the in-game sensitivity; the eDPI Calculator compares the two together.
| DPI | Cursor feel | Often used for |
|---|---|---|
| 400 | Slow, needs a larger mouse pad | Tactical shooters, low-sens aiming. |
| 800 | Balanced | A very common default in FPS games. |
| 1600 | Fast | Desktop use, wide monitors and some competitive setups. |
| 3200 and above | Very fast | High-resolution displays; the in-game sensitivity is usually lowered to match. |
Result a bit off from the stated DPI?
| What you see | Likely cause | What to do |
|---|---|---|
| Reads 5 to 10 percent off | Hand drift or a ruler mark that is slightly off | Repeat three times, move in a straight line, and use the middle value. |
| Different values each run | Pointer acceleration in the OS | Turn off Enhance pointer precision (Windows) and test in Chrome or Edge. |
| Far from the printed DPI | Different DPI stage active | Check the DPI button on the mouse and the stage set in its software. |
| Nothing counted | Pointer lock blocked | Click the box (not tab to it first) and allow the lock if the browser asks. |
Gear that helps
Category searches on Amazon, picked because they relate to what this tool checks. Compare options and read the listing before you buy.
Large cloth mouse pad
Low DPI needs more room to move; a bigger pad avoids running out of space.
Search on AmazonMetric and inch ruler
A real ruler beats judging the distance by eye.
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Frequently asked questions
How do I check my mouse DPI?
Mark a distance with a ruler, click the box on this page, move the mouse that far in a straight line and click again. The page divides the counts by the inches moved to give DPI.
Why is my measured DPI not exactly what the box says?
Small differences from your hand and from sensor tolerances are normal. Repeat three times and use the middle value.
What is a good DPI for gaming?
Most players use 400 to 1600 DPI and adjust in-game sensitivity. Comfort and consistency matter more than the number.
Is higher DPI better?
No. DPI only sets cursor speed. A very high DPI can make small movements jumpy unless you lower the in-game sensitivity.
Does pointer acceleration change the test?
Yes, if the browser cannot give unadjusted movement. Turn acceleration off and use Chrome or Edge for the cleanest reading.
Will it work on a trackpad or touch screen?
It is built for a mouse. Trackpads apply their own scaling and give counts that are not comparable to a mouse sensor.
Is anything uploaded?
No. The count stays in your browser tab.
This article reflects independent editorial research and disclosed buying criteria, not hands-on lab testing or manufacturer sponsorship. Some links on this page are Amazon Associates affiliate links; see our affiliate disclosure.