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A standard paper size and optional pixel density.
Quick math
Paper size converter
Choose a document canvas without memorizing page dimensions.
Privacy built inYour work stays with you
Millimeters
210 × 297 mm
Centimeters
21 × 29.7 cm
Inches
8.268 × 11.693 in
Points
595.28 × 841.89 pt
Pixels at 300 DPI
2,480 × 3,508 px
Your work stays private in your browser while you use this tool.
What does paper size converter do?
The paper-size converter reports a selected sheet's portrait or landscape dimensions in millimeters, centimeters, inches, and points, plus rounded pixel dimensions at a positive DPI.
- Input
- A standard paper size and optional pixel density.
- Result
- Width and height in mm, inches, and pixels.
- Price
- Free
- Account
- Not required
How to use paper size converter
Choose your settings
Choose a document canvas without memorizing page dimensions.
Save or copy
Width and height in mm, inches, and pixels.
A practical tip
Add bleed separately when preparing artwork for professional printing.
When to use paper size converter
Create an A4 canvas at 300 DPI for a printable handout.
Translate US Letter dimensions into millimeters for an international print workflow.
Check the point dimensions of a preset before building a PDF page.
Worked example
A concrete paper size converter example
- Input
- A4 paper, portrait
- Settings
- 300 DPI
- Result
- 210 × 297 mm; 8.268 × 11.693 in; 595.28 × 841.89 pt; 2480 × 3508 px.
What to expect
How it works
Each preset starts with nominal millimeter dimensions. Landscape swaps width and height; inches are millimeters ÷ 25.4, points are inches × 72, and pixels are inches × DPI rounded to whole pixels.
Know before using
Limits and edge cases
- Presets are limited to A0–A6, US Letter, Legal, Tabloid, and Executive; custom sheets, envelopes, and B/C series are not available.
- Pixel dimensions cover the trimmed sheet only. Bleed, crop marks, printer margins, and safe areas must be added in your layout application.
Standards and sources
Common questions
Paper size converter FAQ
Is paper size converter free to use?
Yes. Paper size converter is free to use.
Does paper size converter keep my work private?
Yes. Your work stays private while you use the tool — nothing you enter is uploaded.
Why are pixel dimensions rounded?
A raster canvas must use whole pixels, while converting the exact physical dimensions at a chosen DPI often produces a fraction.
Does switching to landscape change the paper size?
No. It swaps the width and height of the same sheet; the physical area and preset remain unchanged.