Indesign Math — Plugin Free

Adobe InDesign supports scripting in JavaScript. Several generous developers have written free "Sum Selection" scripts.

How to use a free script:

Caution: Scripts are free, but they vary in reliability. Always test on a backup copy of your document first.

Calc4InDesign is arguably the best truly free solution available. Originally developed as a commercial tool, the developer released a legacy version for free to the design community. indesign math plugin free

Key Features:

How it works: You select a cell in a table, open the Calc4InDesign panel, and write a formula like =SUM(ABOVE). The plugin replaces the formula with the numerical result.

Verdict: If you only need basic table math (sums and averages), this is your best free option. It works with InDesign CS6 through the latest CC versions. Adobe InDesign supports scripting in JavaScript

| Feature | Free Methods (LibreOffice / iMathEQ) | Paid Plugin (e.g., InMath $199) | |--------|--------------------------------------|--------------------------------| | Cost | $0 | $100–$250 | | Live editing inside InDesign | No | Yes | | Handles complex matrices | Yes (via LaTeX) | Yes | | Works offline | LibreOffice: Yes / iMathEQ: No | Yes | | Learning curve | Low (if you know LaTeX) | Medium | | Vector output | Yes (SVG/PDF) | Yes (native objects) | | Updates forever | Yes | Limited to version |

Conclusion: Paid plugins offer convenience. Free methods offer freedom and excellent results with one extra step.

Need 10 text frames to be 20px wider? Select them all. In the Width field, type + 20. Every selected frame grows by 20px. Caution: Scripts are free, but they vary in reliability

You do not need to leave InDesign entirely. Use Google Sheets as your external math engine.

The Workflow:

Why this beats a paid plugin for most users: