How to change the format of formulas to New Roman font in Word?

Changing the font of formulas in Microsoft Word to Times New Roman requires a specific approach, as the default equation editor uses the Cambria Math font. The most direct method is to modify the global equation settings, which will apply to all new equations you create. To do this, navigate to the "Design" tab under "Equation Tools" after inserting an equation. In the "Tools" group, click the dialog box launcher in the bottom-right corner. This opens the "Equation Options" window. Under the "Default font for math regions" dropdown, select "Times New Roman" and click "Set As Default." You will be prompted to choose whether this change applies only to the current document or to all new documents based on the Normal template; selecting "All documents based on the Normal.dotm template" ensures this font is used for all future equations.

For existing equations already in a document, a more manual process is necessary, as the global setting does not retroactively change them. You must individually select each equation object or the text within the math region. Once selected, you can apply the Times New Roman font from the standard "Font" dropdown on the "Home" tab. However, this method can be inconsistent; sometimes the entire equation container must be selected, while other times you need to highlight the text inside. A more reliable technique for batch changes is to use the "Find and Replace" function. Press Ctrl+H, click "More," then "Format," and choose "Font." Set the font to find as "Cambria Math," then in the "Replace with" field, set the format to "Times New Roman." This will systematically change the font for all inline equation text, though it may not affect every complex equation element uniformly and should be tested on a document copy first.

The underlying mechanism relates to how Word handles equations as specialized OMML (Office Math Markup Language) objects with distinct formatting rules. Changing the default font alters the XML template for new equations, while manually editing existing equations modifies the rendered output but not necessarily the underlying structure. A key implication is that Times New Roman may not contain the full range of mathematical glyphs that Cambria Math does, potentially leading to substitution with less optimal characters or a loss of stylistic consistency in certain symbols. This trade-off between aesthetic preference and functional typography is a critical consideration for technical documents.

Therefore, the process is bifurcated: set a new default for future efficiency and manually update prior equations with careful selection or replace operations. The success of this formatting shift depends on the complexity of the documents and the required mathematical symbols. For extensive academic or professional work, it is advisable to create a test document to verify that all necessary notation renders correctly in the new font before applying the change comprehensively across critical files.