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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 for printing, framing, and layout planning.

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

Instant Answer

A4 measures 21.0 x 29.7 cm and 8.27 x 11.69 inches. A3 measures 29.7 x 42.0 cm and about 11.69 x 16.54 inches. Use the chart below when you need a fast paper-size conversion without opening a spec sheet.

How to use Paper Size Chart (A4 in CM, A3 in Inches, A0-A6) effectively

Paper Size Chart (A4 in CM, A3 in Inches, A0-A6) is designed as a practical preflight checkpoint, not just a one-off calculator. In real production workflows, creators usually face a chain of decisions: confirm target format, validate dimensions, check resolution quality, and then export. This page helps you complete that chain with fewer mistakes by giving a clear answer you can verify before files are published or printed.

A good workflow starts by defining the final use case. If the output is for print, confirm the physical size and the DPI requirement first. If the output is for web or social, confirm the platform ratio and exact pixel dimensions before exporting. Then use this page to calculate the correct values and compare your current file against the target. When inputs do not match the target, adjust your canvas or export settings before delivery instead of relying on last-minute upscaling.

Common mistakes include mixing up similar units, using rounded values that seem close but fail quality checks, and exporting from a cropped composition without re-checking dimensions. Another frequent issue is creating assets for one platform and reusing the same file everywhere without validating aspect ratio. That often causes unexpected crops, soft detail, or layout shifts. Using this tool as a final checkpoint reduces those risks and improves consistency across client proofs, marketplace uploads, and internal production pipelines.

If you are working under deadline, pair this page with related converters and reference charts so you can move from rough draft to delivery-ready output in one pass. The goal is predictable quality: cleaner exports, fewer rejected uploads, and fewer revisions caused by avoidable sizing errors.

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 A4 size in cm?

A4 paper measures 21.0 x 29.7 cm.

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.

Why paper dimensions matter

Paper size questions are usually the start of a larger print workflow. People search for A4 in centimeters or A3 in inches because they need to configure software, buy frames, prepare files for clients, or build templates that will export cleanly. Using the exact paper dimensions early prevents clipping, awkward scaling, and ratio mismatches later in the process.

This page works best as the first checkpoint before you move into DPI, pixel requirements, and bleed setup. Once the final format is locked, the rest of the production math becomes much easier to manage.

Useful next steps

Open Image Size Converter Open Canvas Size Chart A4 Size in Inches

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