**Below one will find:**

A short discussion on the importance of DPI/Pixel settings right prior to printing,

A table of pre-determined values for large format printing,

The formula used in the calculations, and an

Automatic calculator for the user’s convenience.

When uploading an image file online to a poster printer or photographic print producer, the following table should prove useful. If your image is not formatted with the printing company’s required DPI settings, it likely disappoint with result when you receive a pixelated image.

I recommend calling your printer prior to uploading an image file file in order to inquire as to what specifications are needed to print a non-pixelated poster, or large format photograph. Also ask them if they compress your hi-resolution images prior to printing in order to save ink. Just because you upload a high quality image does not therefore preclude an unscrupulous printer from rendering it low-quality prior to printing. After all, they are printing for profits.

Picture Size in Inches” |
Pixels(px) required for 150 DPI |
Pixels(px) required for 300 DPI |

4 x 6 | 600 x 900 | 1200 x 1800 |

5 x 7 | 750 x 1050 | 1500 x 2100 |

8 x 10 | 1200 x 1500 | 2400 x 3000 |

11 x 14 | 1650 x 2100 | 3300 x 4200 |

16 x 20 | 2400 x 3000 | 4800 x 6000 |

20 x 24 | 3000 x 3600 | 6000 x 7200 |

24 x 36 | 3600 x 5400 | 7200 x 10800 |

36 x 48 | 5400 x 7200 | 10800 x 14400 |

48 x 72 | 7200 x 10800 | 14400 x 21600 |

**Formula for calculations: **

Multiply the picture size or width and height dimensions by DPI or (W x DPI) and (H x DPI).

**Example for 20 x 30**at 150 DPI: (20 x 150)=**3000**(30 x 150)=**4500****Example for 20 x 30**at 300 DPI: (20 x 150)=**6000**(30 x 300)=**9000**