Resize image dimensions using PowerPoint

Normally to resize images you would use an image-editing software such as Adobe’s Photoshop, GIMP, etc. However, this tutorial is for those who have no access or knowledge to such software. Image sizes are mostly represented in pixels. However, PowerPoint uses Inches or Centimeters depending on your PowerPoint units customization. In addition to its size an image also has resolution in DPI (dots per inch) or PPI (pixels per inch) which affects its size and clarity.

Step 1

To resize an image in Powerpoint, we first need to convert the image’s unit from pixel to inch value. The formula to convert pixel to inch is as follow Pixel  /  Pixels per inch In the above formula,
  • We already know the pixel value the image needs to be resized to.
  • The pixel per inch in the image’s resolution value  at which your PowerPoint exports
 

Step 1.1: Finding pixels per inch (resolution value) used by your PowerPoint

 
  • Insert an autoshape
  • Right-click on the inserted autoshape
  • Choose Save as Picture
  • Use Jpeg for the picture type and click Save
  • Go to the folder where the picture was save and find out the resolution value
  • Right-click on the image and click Properties
  • Select Details tab, and note down the resolution value
 

Step 1.2: Substituting the values to the formula

For the case of this tutorial, I need the image resized to 800 pixels wide and 650 pixels height. My PowerPoint exports images at 150 PPI resolution Using the formula, I need to find the inch value for 800 pixels and 650 pixels
  • Width = 800 / 150 = 5.33 inches
  • Height = 650 / 150 = 4.33 inches
 

Step 2

Resizing the images in PowerPoint using the values we calculated in the previous step
 
  • Insert the image which needs to be resized
  • Go to the picture format pane and deselect “Lock aspect ratio” and “relative to original size”
  • Use the height and width value you calculated in the previous step.
  • Crop the image if required to remove any resize abnormalities.
  • Right-click on the image and Choose Save as Picture
  • Use Jpeg for the picture type and click Save
And there we have it! That’s how to resize images using PowerPoint.

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