Quick answers before you test
How do I convert mouse sensitivity to tablet area?
Area width = screen width in pixels ÷ (DPI × osu! sensitivity), in inches; multiply by 25.4 for millimetres. 800 DPI at 1.0× on a 1920-pixel screen is 61 × 34 mm.
How big is the osu! playfield?
512 × 384 osu! pixels scaled to your window’s height: 1152 × 864 screen pixels at 1080p, centred across and slightly below the middle.
Should the area match my screen shape?
Yes. An area wider or taller than the screen’s shape stretches movement in one direction, and circles stop feeling round. The calculator keeps the shape for you.
Why does the same area feel smaller than my mouse?
A tablet places the cursor where the pen is, with no lifting and no acceleration, so the same distance can feel shorter. Start at the calculated area and adjust a few millimetres at a time.
What the result actually measures
With raw input on, a mouse moves the cursor DPI × sensitivity pixels for every inch of hand travel; a tablet spreads its area over the screen, so the area with the same travel is screen pixels ÷ (DPI × sensitivity) inches in each direction. Mapped to the playfield only, the same rule runs over the playfield’s pixels: 512 × 384 game pixels scaled by window height ÷ 480. The reverse direction divides the screen’s pixels by the area’s width to give the sensitivity. The tablet is drawn from its maker’s active-area specification, the area centred on it with the playfield inside, placed 8 game pixels below the middle as osu! places it.
Measurement boundary: It assumes raw input, or Windows pointer speed at 6 of 11 with Enhance pointer precision off; otherwise the mouse side is not linear. Tablet sizes are the makers’ active areas; a driver may report a slightly different area. The result is the same hand travel, not the same feel: many players settle a little larger or smaller after a few sessions.
How to interpret the output
Tablet area
Width × height in millimetres that crosses the screen with the same hand travel as your mouse. Enter both, centred, and keep the aspect lock on.
Playfield part
The part of the area where the notes are. With whole-screen mapping, it is the area that matters for aiming; the rest reaches the screen edges.
Share of the tablet
How much of the tablet the area uses. Over 100% means the tablet is too small for this travel: use its full area and accept a faster cursor.
Troubleshooting unexpected results
The area does not fit my tablet
Your mouse travel is longer than the tablet. Map the full active area; the cursor will move faster than on your mouse, and the note shows by how much.
Circles feel oval
The area’s shape differs from the screen’s. Set the height the calculator gives for your width, or turn on the aspect lock in your driver.
Windows Ink or smoothing adds lag
Use a driver with low latency and no smoothing for osu!, such as OpenTabletDriver, and turn off Windows Ink unless your setup needs it.
Frequently asked questions
What tablet area should I use for osu!?
Start with the area that matches your mouse travel: the calculator gives it from your DPI and sensitivity. Players then go smaller for faster jumps or larger for steadier aim.
How do I convert tablet area to sensitivity?
Switch to Tablet area to mouse sensitivity, enter the area width and your DPI. Sensitivity = screen width in pixels ÷ (area width in inches × DPI).
Does resolution change my tablet area?
For whole-screen mapping, the area that matches a mouse depends on the screen’s pixels, so a higher resolution at the same DPI and sensitivity gives a larger area. The tablet itself maps proportionally, so changing resolution does not change how an existing area feels.
What is the osu! playfield size at 1440p?
1536 × 1152 pixels: 512 × 384 osu! pixels scaled by 1440 ÷ 480 = 3.
Do I enter the area in millimetres or inches?
OpenTabletDriver and most drivers use millimetres; the calculator gives millimetres. Divide by 25.4 for inches.
