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A keyboard with Num Lock turned on as indicated by a LED

Num Lock or Numeric Lock () is a key on the numeric keypad of most computer keyboards. It is a lock key, like Caps Lock and Scroll Lock. Its state affects the function of the numeric keypad commonly located to the right of the main keyboard and is commonly displayed by an LED built into the keyboard.

The Num Lock key exists because earlier 84-key IBM PC keyboards did not have cursor control or arrows separate from the numeric keypad. Most earlier computer keyboards had different number keys and cursor control keys; however, to reduce cost, IBM chose to combine the two in their early PC keyboards. Num Lock would be used to select between the two functions. On some laptop computers, the Num Lock key is used to convert part of the main keyboard to act as a (slightly skewed) numeric keypad rather than letters. On some laptop computers, the Num Lock key is absent and replaced by the use of a key combination.[1]

Since Apple Keyboards never had a combination of arrow keys and numeric keypad (but some lacked arrow keys, function keys, and a numeric keypad altogether), Apple has keyboards with a separate numeric keypad but no functional Num Lock key. Keyboards manufactured by Apple will instead use a Clear key but not all Apple manufactured keyboards will be provided with it.[2]

Numeric keypad
Keys affected by Num Lock
Key on
Numeric Keypad
Num Lock On Num Lock Off
1 1 End
2 2 Down Arrow
3 3 Page Down
4 4 Left Arrow
5 5 does nothing (usually)[3]
6 6 Right Arrow
7 7 Home
8 8 Up Arrow
9 9 Page Up
0 0 (zero or comma) Insert
. . (dot) or, (comma) Delete
Esc F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 PrtScn/
TildeExclamation markAt signNumber signDollar signPercent signCaretAmpersandAsteriskParenthesisParenthesisUnderscorePlus signBackspaceBacktick1 (number)2 (number)3 (number)4 (number)5 (number)6 (number)7 (number)8 (number)9 (number)0Hyphen-minusEquals signBackspaceTab keyQWERTYUIOPCurly bracketCurly bracketVertical barTab keyQWERTYUIOPSquare bracketSquare bracketBackslashCaps lockASDFGHJKLColon (punctuation)Quotation markEnter keyCaps lockASDFGHJKLSemicolonApostropheEnter keyShift keyZXCVBNMBracketBracketQuestion markShift keyShift keyZXCVBNMComma (punctuation)Full stopSlash (punctuation)Shift keyControl keyWindows keyAlt keySpace barAlt keyWindows keyMenu keyControl key
Insert Home PgUp Num
Delete End PgDn 7 8 9 +
4 5 6
1 2 3 Enter


  1. ^ "Press Fn+F8, F7, or Insert to enable/disable numlock". Lenovo Support. Retrieved 2023-09-18.
  2. ^ "Use your Apple Keyboard in Windows with Boot Camp". Apple Support. Retrieved 2022-01-16.
  3. ^ "keyboard - Has the '5' key on the numeric keypad ever had an alternate function in hardware?". Super User. Retrieved 2022-01-16.