Key Rollover Test
Hold real key combos and see how many simultaneous inputs your keyboard reports locally.
Now
0
Keys held
Best
0
Peak combo
Status
Untested
Hold real combos to find the limit.
Hold W + A + Space, Shift combos, or your real shortcut.
Best combo: None yet. Distinct keys touched: 0.
Read result
Use the highest repeatable result, not one lucky press.
2-5 keys
Basic rollover. Fine for typing, risky for games or dense shortcuts.
6 keys
Classic 6KRO. Retest over USB before replacing anything.
10+ keys
Likely NKRO behavior when the same result repeats over wired mode.
Fix path
Confirm connection mode first. Replace only when the exact combo still fails.
Matched recommendation
If rollover is the limit
Matched to the issue path above. We may earn a commission from qualifying purchases.
Frequently Asked Questions
What is key rollover? +
Key rollover is how many simultaneous key presses a keyboard can report reliably. 6KRO means about six non-modifier keys at once, while NKRO means each key can report independently when the hardware and connection support it.
How many keys should my keyboard register at once? +
For normal typing, a few keys at once is enough. For gaming, music shortcuts, or complex hotkeys, test the exact combinations you use instead of chasing a maximum number that may not matter.
Why does Bluetooth reduce keyboard rollover? +
Many Bluetooth keyboards use HID modes that limit simultaneous keys to save bandwidth and power. If rollover matters, retest with a wired USB connection or a 2.4 GHz receiver.
Keyboard path
Finish with evidence.
Jump back to the live tester, then use repair-first picks only when the result is repeatable.