How to Type X Bar in Word

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   Step 1: Insert an equationPress Alt+= on Windows or Control+= on a Mac, or choose Insert › Equation.
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   Step 2: Type the letter and the accent codeType x\bar and press Space. Word applies the bar to the character before it. \hat, \tilde and \dot work the same way.
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   Step 3: Continue the formulaKeep typing, for example =1/n and Space for a fraction, then press → to leave the equation.

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   Step 1: Open the Equation tabClick inside an equation so the Equation tab appears.
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   Step 2: Choose Accent › BarIn the Structures group click Accent and pick Bar (short) or Overbar (stretches over several characters).
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   Step 3: Fill the boxClick the small placeholder box and type x.

When the x̄ must sit in a sentence or a table cell without an equation box, use a combining character. On Windows type x, then 0304, then press Alt+X: Word turns the code into a macron above the x. 0305 gives a longer overline.

On a Mac, Word has no Alt+X; insert the bar through Insert › Advanced Symbol (search for "combining macron") right after the x, or use an equation.

For a longer formula with x̄, write it once in LaTeX in the LaTeX equation editor, check the preview, and click Copy for Word. It pastes into Word as an editable equation, bar included.