The most common **A3 paper size in micrometres is 297000 x 420000 μm**. To calculate the A3 size (and other A sizes) in micrometres, you can use the calculator below. First, select the A-size and then choose the unit in which you want the calculation. The result is shown in the last column undersize.

A micrometre is a measure of length. The micrometre has the symbol μm. Expressed in meters, a micrometre is 10 to the power -6 (10^{−6}). This is 0.000 001 meters, a one-millionth particle of a meter. Relative to a millimetre is a micrometre 0.001 mm.

### A3 size in micrometres calculator

The A-size is standard on an A3. You can also choose an A3, for example. Select the desired unit if you want a unit other than micrometres. The result is in the last column. Below the calculator is an A3 in portrait and landscape mode with corresponding values.

### Overview A-size in micrometres

Overview of the A3 size in micrometres (μm). See on the left side the A-size and on the right side the number of micrometres.

Size | Micrometer |
---|---|

4A0 | 1682000 x 2378000 |

2A0 | 1189000 x 1682000 |

A0 | 841000 x 1189000 |

A1 | 594000 x 841000 |

A2 | 420000 x 594000 |

A3 | 297000 x 420000 |

A4 | 210000 x 297000 |

A5 | 148000 x 210000 |

A6 | 105000 x 148000 |

A7 | 74000 x 105000 |

A8 | 52000 x 74000 |

A9 | 37000 x 52000 |

A10 | 26000 x 37000 |

### Other units such as centimetres, pixels and meters

Choose from the units below for the A3 size in Millimeters (mm), Centimeters (cm), Meters (m), Thou (th), Inches (in), Feet (ft), Yards (yd), Pixels, Pica, Point and HPGL.