Page Margin Calculator
Enter page size and margin values to instantly see the printable area in mm and inches.
100% client-side · no upload
Printable width
Printable height
How to use
- Enter your page width and height in millimetres (e.g. 210 × 297 for A4, 215.9 × 279.4 for US Letter).
- Enter your margin values in millimetres for all four sides.
- The printable area updates instantly in both millimetres and inches.
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Frequently Asked Questions
- Is this page margin calculator free?
- Yes, completely free with no signup and no usage limits.
- Does my data leave my device?
- No. All calculations run in JavaScript inside your browser. No data is sent to any server.
- Does it work on mobile?
- Yes. The calculator is mobile-first and works on iPhone Safari and Android Chrome.
- What are standard margins for A4 documents?
- Word and LibreOffice default to 25 mm (≈1 inch) on all sides for A4. Academic documents often use 25 mm top/bottom and 30–38 mm left (binding side) / 20 mm right. For maximum content area, 15 mm on all sides still prints on most home printers.
- Where can I find my page dimensions?
- Standard sizes are listed in the Paper Size Reference tool linked below. A4: 210 × 297 mm. US Letter: 215.9 × 279.4 mm. Legal: 215.9 × 355.6 mm.
Last updated: By jarvisbox