Nitrax Mathematical Keyboard vs Alt Codes
When a sentence needs ±, remembering 0177 is another task between your thought and your document. Nitrax Mathematical Keyboard puts mathematical, Greek and scientific symbols directly on the keys of a compact physical computer keyboard.
After setup, key combinations type the symbols in its blue and gray printed layers. Instead of keeping a list of character codes nearby, you have the symbols in sight where you type.
One sentence, two routes to ±
The specified length is 10 ± 0.2 mm.
Alt code in Word for Windows
With Western Windows-1252 settings, hold Alt, type 0177 on the numeric keypad, then release Alt.
Use Num Lock if required. The number row above the letters does not replace the keypad.
Nitrax Math Keyboard
Find the blue ± printed on the +/= key. Use its blue-layer key combination after setup, then continue the sentence.
The printed symbol gives you a physical reference; you still learn the combination.
Native input references: Microsoft’s Word instructions and Microsoft’s Windows-1252 character mapping, hosted by the Unicode Consortium.

What changes when the reference is on the keys?
| Consideration | Alt codes | Nitrax Math Keyboard |
|---|---|---|
| Finding a symbol | Recall the code or consult a reference. | Look for the symbol printed on a key. |
| Hardware | Use an existing numeric keypad for the classic method. | Purchase a compact physical keyboard with letters and math symbols. |
| Windows setup | Use the application’s supported native input. | Install the Nitrax Mathematical Keyboard Microsoft Store app and enable Math Mode, which activates the printed symbol combinations. |
Keep a few codes, or choose printed symbols
If you occasionally need ± and already remember its code, your existing keypad may be enough. Word also supports a separate Unicode-code conversion using Alt+X; it is not the same as the numeric keypad method.
If your notes, lessons or exercises use a changing mix of Greek letters and mathematical symbols, Nitrax Math Keyboard gives you a visible reference for everyday writing. The purchase makes sense when you want those symbols on the hardware you use.
Check the Windows setup requirements for your computer before buying. Application and font support varies. Nitrax Math Keyboard enters symbols; an equation editor handles stacked fractions and aligned equations.
Put your symbol reference on your keyboard
Choose Nitrax Mathematical Keyboard when you want mathematical, Greek and scientific symbols printed where you type, instead of keeping a growing list of Alt codes.
Buy nowPublished by the maker of Nitrax Mathematical Keyboard.