Windows
Hold Alt and type 363 on the numeric keypad.
Accents
Copy the character, or use the shortcut that matches your keyboard and app.
All U accentsHold Alt and type 363 on the numeric keypad.
Character Viewer → u macron
Type 016B then Alt + X
Insert → Special characters → u macron
Click the keycap, then paste with Ctrl+V or Cmd+V.
Num Lock on, hold Alt, type 363, release Alt.
Use the Unicode, HTML, CSS, or JS value below in documents and stylesheets.
U+016Būū\016B\u{016B}Alt + 363