Square centimeters to A series
Type a value in cm² to get it in A instantly.
A3A
That's about the same as an A3 sheet. With ISO proportions that is a sheet of about 297.3 × 420.4 mm (11.7 × 16.55 in).
Convert the other way: A to cm²
What it means
How big is that sheet?
ISO 216 sizes are rounded to whole millimeters on real sheets. US sizes are compared by area; their proportions differ from √2.
The math
How to convert cm² to A
Area of A n = 2^−n m²; B n = 2^(½−n) m², C n = 2^(¼−n) m². Sides are in the ratio 1 : √2.
Example: 1,250 cm² = A3 A.
Every unit
That sheet in every system
Tables
cm² to A conversion table
| cm² | A |
|---|---|
| 9.77 cm² | A10 A |
| 19.5 cm² | A9 A |
| 39.1 cm² | A8 A |
| 78.1 cm² | A7 A |
| 156 cm² | A6 A |
| 313 cm² | A5 A |
| 625 cm² | A4 A |
| 1,250 cm² | A3 A |
| 2,500 cm² | A2 A |
| 5,000 cm² | A1 A |
| 10,000 cm² | A0 A |
A to cm² conversion table
| A | cm² |
|---|---|
| A0 A | 10,000 cm² |
| A1 A | 5,000 cm² |
| A2 A | 2,500 cm² |
| A3 A | 1,250 cm² |
| A4 A | 625 cm² |
| A5 A | 312.5 cm² |
| A6 A | 156.25 cm² |
| A7 A | 78.125 cm² |
| A8 A | 39.0625 cm² |
| A9 A | 19.5313 cm² |
| A10 A | 9.76563 cm² |
Quick answers
Quick answers
- How many A is 1 cm²?
- 1 cm² is ≈A13 A.
- How many A is 10 cm²?
- 10 cm² is ≈A10 A.
- How many A is 1,250 cm²?
- 1,250 cm² is A3 A.
The units
About these units
Square centimeters (cm²)
Sheet area in square centimeters.
A series (A)
ISO A sizes: A0 is 1 m², A4 a sixteenth.
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