Hold the Alt key and type 8730 on your numeric keypad (the number row above the letters will not work). Release Alt → √ appears.
If you just want the symbol for labeling, use the Alt + 251 (Windows) or Option + V (Mac) shortcuts mentioned above. 5. Chromebook and Linux Chromebooks use Unicode entry for special characters. square root keyboard shortcut
Word offers a few unique ways to insert the symbol beyond the standard Windows Alt code. Hold the Alt key and type 8730 on