A3 ↔ A4 Converter
Convert measurements and scale drawings between A3 and A4 paper sizes
A3
Width: 297 mm (29.7 cm)
Height: 420 mm (42.0 cm)
In Inches: 11.69" × 16.54"
A4
Width: 210 mm (21.0 cm)
Height: 297 mm (29.7 cm)
In Inches: 8.27" × 11.69"
Scaling Factor
A3 → A4: 0.7071× (Reduction)
A4 → A3: 1.4141× (Enlargement)
Measurement Converter
Scaled measurement on A4
70.71 mm
In mm: 70.71 mm
In cm: 7.07 cm
In m: 0.0707 m
In inches: 2.78 in
Quick Reference Table
| A3 | A4 |
|---|---|
| 10 mm | 7.07 mm |
| 50 mm | 35.36 mm |
| 100 mm | 70.71 mm |
| 200 mm | 141.43 mm |
| 500 mm | 353.57 mm |
| 1000 mm | 707.14 mm |