The A3 size in millimetres (mm) is 297 x 420 millimetres. For the calculation of the A3 size in mm, you can use the calculation tool below. Choose the A size and select the unit in which you want to calculate the A size. In the last column, you will find the result. More information about A3 size in millimetres can be found on the page What is A3 size in mm?
Millimetres are a measure of the length of the metric system. The abbreviation of a millimeter is mm. A millimetre is one-thousandth of a meter. A millimetre is one-tenth of a centimetre.
A3 in millimetres calculator.
Choose from which A-size you want the number of millimetres. Next to the A-size is a dropdown with different units. On this page, it is set in mm. The result is shown in the last column. Below the calculator, you will see an image of A3 paper size. The corresponding number of millimetres is indicated.
Overview A-size in millimetres
Below is an overview of the A3 size in millimetres (mm). The table shows an overview of a 4A0 to A10.
| Size | Millimeter |
|---|---|
| 4A0 | 1682 x 2378 |
| 2A0 | 1189 x 1682 |
| A0 | 841 x 1189 |
| A1 | 594 x 841 |
| A2 | 420 x 594 |
| A3 | 297 x 420 |
| A4 | 210 x 297 |
| A5 | 148 x 210 |
| A6 | 105 x 148 |
| A7 | 74 x 105 |
| A8 | 52 x 74 |
| A9 | 37 x 52 |
| A10 | 26 x 37 |
Other units
Choose from the units below for the A3 size in Micrometres (μm), Centimeters (cm), Meters (m), Thou (th), Inches (in), Feet (ft), Yards (yd), Pixels, Pica, Point and HPGL.
