Is your image the right size for your poster?

Step 1:
Add the size of your image in pixels

Width (pixels)

Height (pixels)


Step 2:
Add the size of your poster in millimetres

Width (mm)

Height (mm)

IMAGE RESOLUTION: Watch our video below for help


How big can I print?

The tables show the image quality expected from various camera resolutions. These figures assume that you will be using the entire image without cropping as cropping will reduce the final file size.

Note also, newer cameras often have better lenses and processors which can also improve image quality over older models with similar resolution.

  • 8MP - iPhone 5, 6, Galaxy S4, S5
  • 12MP (Recent Models) - iPhone 6s, 7, Galaxy S6, S7
  • 12MP (Current Models) - iPhone 8, X, Galaxy S8, S9, S10
A0 (1189 x 841mm)
8MP - Good
12MP (Recent Models) - Good
12MP (Current Models) - Great
A1 (841 x 594mm)
8MP - Good
12MP (Recent Models) - Great
12MP (Current Models) - Great
A2 (594 x 420mm)
8MP - Good
12MP (Recent Models) - Great
12MP (Current Models) - Great

Download our Help Guides

Help sheet
Resolution guide
What file types do you accept?

We accept a range of different formats: JPEG (JPG), PNG, TIF, PDF. These are the formats we recommend:

  • For photos: high resolution JPEGs (preferably uncompressed)
  • For graphics or text: vector based PDFs
  • For a mix of graphics and photos: PDFs
What is the difference between vector and bitmap images?

A bitmap (e.g. JPEG, PNG, TIF) is made up of thousands of tiny squares or 'pixels' which are all the same size. The number of pixels in an image is called 'resolution'. When an image looks sharp or photographic it has a high number of pixels and it is a 'high resolution' image measured in pixels per inch (PPI). When there are fewer pixels an image will look soft or 'pixellated'.

As bitmap images have a set number of pixels, they will lose quality when enlarged. It is, therefore, better to send us 'high-resolution JPEGS'. A vector image uses coordinates to plot each point on a line or curve. This means that vector images can be enlarged while maintaining quality. Save graphics, text and line art as 'vector based' PDFs. This is possible in applications such as Adobe Illustrator, InDesign and Photoshop.

Bleed and trim set-up guide

At PosterFactory we print to the edge of your specified page size. To get the best possible results, we suggest setting up your print file with 3mm of bleed (extra image) on all sides of your print. Trim marks are usually set outside of the bleed area. Note: Image bleed is extra image or background colour extended beyond the print area. Adding extra white does not constitute bleed.

If you are unable to provide bleed or trim marks, make sure that any text or important elements are not too close to the edges.

Can’t do trim marks?

If you are unable to provide bleed or trim marks, we print your file slightly larger (creating 1-2mm of bleed) then trim off the excess to the correct finished size. As such, make sure that any text or important elements are at least 6mm away from the edges so they don’t get trimmed off.

Extra border for framing

PosterFactory prints and cuts your file to the specified print size ordered. If you want extra borders for framing purposes, please include this in the overall print size.

For example if you would like an A3 print (297x420mm) but would like an additional 10mm on each side, you will need to set up and order your print size at 317x440mm.

Note: If you want a white border, include the required amount within your artwork file. If your file has a white border or white area around your image, your file will be printed with the white border or white area included.

Image Colour Mode

For the best possible colour reproduction we advise you to supply images as RGB files. RGB files print with a larger colour gamut than CMYK files. Images should also be saved with their respective RGB profiles. Most web based or camera captured images will have sRGB or Adobe RGB profiles and differences may not always be noticeable. However there are a number of less common image profiles that may cause colour issues if the profile has not been embedded.

How to avoid my image printing too dark compared to my screen?

There are a number of things that you can do to prevent this happening even when working with an uncalibrated screen. First, lower the brightness of your screen so that brightest part of your screen (white) has the same level of brightness as a white piece of paper. Once you have done this have a look at your image on a white, grey and black background. Reduce the image size on screen and review the image at a matchbox size (app 30x 40 mm ). Now adjust your image until you are happy with it whilst viewing it in each of the above scenarios and be assured that your printed result will not be too dark.

Our resolution guide

The recommended resolution for printing posters from A2 to A0 is a minimum of 72ppi at final output size. Higher resolution files are the best. The following sizes are a guide to pixel resolutions required for various print sizes. Before uploading your image, check that your image resolution is high enough for the size of print that you require. For more information on our printing services or specs - call us on +61 2 8594 3555.

  • A2 (420mm x 594mm) - 1191 x 1684 pixels @72ppi
  • 30 x 40” (762mm x 1016mm) - 2160 x 2880 pixels @72ppi
  • A1 (841mm x 594mm) - 2384 x 1684 pixels @72ppi
  • A0 (1189mm x841 mm) - 3370 x 2384 pixels @72ppi
Checking your image resolution

If you don’t have a dedicated image processing program you can view your image’s resolution in the ways outlined below.


Right click on the image file and select ‘Properties’. Select the ‘Details’ tab and scroll down to ‘Dimensions’.


Select the image and select File/Get Info. Pixel dimension will be displayed in the ‘More Info’ section.

Will my poster match what I see on my screen?

It will probably end up looking better than you expect. Image quality is our passsion and we have selected the best possible machines to produce your posters. We use Epson printers for truely outsanding colours, clarity and precision printing. We ‘calibrate’ our machines to ensure we exceed the result you are expecting.

What’s the difference between RGB and CMYK?

We print using CMYK technology to print your posters.

  • Red, Green and Blue
  • Used for screens
  • Uses pixels of varying amounts of RGB light to create colours
  • The higher the levels of RGB the brighter the colour
  • As RGB colours are created with light colours can be brighter than CYMK
  • Cyan, Magenta, Yellow and Black
  • Used for print
  • Uses halftones or dots and colours become darker the more CMYK used
  • CMYK images get their brightness from the paper stock they are printed on