A0 to A4 Conversion
A4 is 1/16th of A0. This is the largest common ratio between A-series sizes. You would fold A0 four times to reach A4, resulting in a 16:1 area reduction.
A0 (Original)
A0
841 × 1189 mm
33.1 × 46.8 in
33.1 × 46.8 in
A4 (Result)
A4
210 × 297 mm
8.3 × 11.7 in
8.3 × 11.7 in
📊 A0 vs A4 Quick Facts:
• Ratio: 16 A4 sheets = 1 A0 sheet (4 × 4 grid)
• Fold: A0 → A1 → A2 → A3 → A4 (fold 4 times)
• Scale Factor: 25% of each dimension
• Uses: A4 for documents, letters, and printing
• Ratio: 16 A4 sheets = 1 A0 sheet (4 × 4 grid)
• Fold: A0 → A1 → A2 → A3 → A4 (fold 4 times)
• Scale Factor: 25% of each dimension
• Uses: A4 for documents, letters, and printing
📏 Complete Dimensions
| Unit | A0 | A4 |
|---|---|---|
| Millimetres | 841 × 1189 mm | 210 × 297 mm |
| Centimetres | 84.1 × 118.9 cm | 21.0 × 29.7 cm |
| Inches | 33.1 × 46.8 in | 8.3 × 11.7 in |
| Pixels @ 72 DPI | 2384 × 3370 px | 595 × 842 px |
| Pixels @ 300 DPI | 9933 × 14043 px | 2480 × 3508 px |
| Pixels @ 600 DPI | 19866 × 28087 px | 4961 × 7016 px |
🎨 Common Uses
- A0: Large posters, technical drawings, professional displays
- A4: Documents, letters, magazines, forms, standard printing
🔁 Related Conversions
- A0 to A1 – Half size
- A0 to A2 – Quarter size
- A0 to A3 – Eighth size
- A4 to A0 – Reverse (16×)
- A4 to A3 – Double size
❓ Frequently Asked Questions
How many A4 fit in A0? Exactly sixteen A4 sheets fit into one A0 sheet in a 4 × 4 grid.
How do I convert A0 to A4? Fold four times, or scale each dimension to 25% when printing.