What is A4 size in cm?
A4 paper measures 21.0 x 29.7 cm.
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Paper Size Chart (A4 in CM, A3 in Inches, A0-A6)
This quick paper size chart shows ISO A-series dimensions from A0 to A6 in millimeters, centimeters, and inches. Use it as a reference for printing, framing, artwork prep, and design layouts when you need fast answers like A4 size in cm or A3 size in inches.
A0 to A6 Paper Sizes
All values below follow ISO 216 standard dimensions.
| Format | Millimeters (mm) | Centimeters (cm) | Inches (in) |
|---|---|---|---|
| A0 | 841 x 1189 | 84.1 x 118.9 | 33.11 x 46.81 |
| A1 | 594 x 841 | 59.4 x 84.1 | 23.39 x 33.11 |
| A2 | 420 x 594 | 42.0 x 59.4 | 16.54 x 23.39 |
| A3 | 297 x 420 | 29.7 x 42.0 | 11.69 x 16.54 |
| A4 | 210 x 297 | 21.0 x 29.7 | 8.27 x 11.69 |
| A5 | 148 x 210 | 14.8 x 21.0 | 5.83 x 8.27 |
| A6 | 105 x 148 | 10.5 x 14.8 | 4.13 x 5.83 |
Common Questions
What is A3 size in inches?
A3 paper is about 11.69 x 16.54 inches.
Why do A-series paper sizes keep the same ratio?
Every A-size sheet keeps an aspect ratio close to 1:√2, so folding or scaling preserves proportions.
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