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300DPI for example, equals 118.11 PPI. For a good printing 300 DPI is standard, sometimes 150 is acceptable but never lower, you may go higher for some situations.

Compress individual pictures To compress all pictures in your document, on the ribbon, select File > Compress Pictures (or File > Reduce File Size). on the Picture Format tab. Select an option in the Picture Quality box. Highest resolution is listed first and the lowest resolution is listed last.

DPI refers to how many dots per inch there are in a printed image. PPI refers to how many pixels per inch there are in a digital image.A 300 PPI image will still be a 300 DPI image. They both refer to the number of units within a square inch of an image.

However, the terms do not mean the same thing and there are distinct differences between the two: DPI refers to the number of printed dots contained within one inch of an image printed by a printer. PPI refers to the number of pixels contained within one inch of an image displayed on a computer monitor.

DPI refers to the number of printed dots contained within one inch of an image printed by a printer. PPI refers to the number of pixels contained within one inch of an image displayed on a computer monitor.

PPI refers to how many pixels per inch there are in a digital image. So, technically, it's PPI until you have a physically printed image, then it becomes DPI and vice versa. However, pixels and dots are pretty much interchangeable. A 300 PPI image will still be a 300 DPI image.

You're right that the only difference is in the metadata: if you save the same image as 300dpi and 72dpi the pixels are exactly the same, only the EXIF data embedded in the image file is different.