Pixel to Inches Calculator: Convert Digital to Physical Measurements

Why do my images look different on screen vs. print?

Screen displays typically use 72-96 PPI, while printing requires 300 PPI for optimal quality. This difference in pixel density can make images appear larger on screen than in print. Additionally, screens emit light while prints reflect it, which can affect how colors and details appear.

What PPI should I use for my project?

Choose your PPI based on the final output:

• Web/screen viewing: 72-96 PPI
• Standard printing: 300 PPI
• Large format printing: 150-200 PPI
• Mobile devices: Check device specifications

How does PPI affect file size?

Higher PPI means more pixels per inch, resulting in larger file sizes. A 300 PPI image will be significantly larger than the same image at 72 PPI. For example, a 4x6 inch image at 300 PPI will be about 17 times larger in file size than the same image at 72 PPI.

What's the difference between PPI and DPI?

PPI (Pixels Per Inch) refers to digital image resolution, while DPI (Dots Per Inch) refers to printed output resolution. While often used interchangeably, they measure different things. PPI determines digital image quality, while DPI refers to how many dots of ink a printer places in an inch.

Can I convert a low-resolution image to high-resolution by changing the PPI?

No, simply changing the PPI setting doesn't add new pixel information to your image. When you increase PPI without adding new pixels, the image quality typically decreases as the existing pixels are stretched over a larger area. This is why it's important to start with high-resolution images if you plan to print them.

What size should my images be for social media?

Common social media image sizes in pixels (at 72 PPI):

How do I determine the right image size for my website?

For websites, consider these factors:

• Screen sizes: Design for common device resolutions
• Load times: Balance quality with file size
• Retina displays: Consider providing 2x resolution images
• Responsive design: Use appropriate sizes for different breakpoints

Why are my printed images blurry?

Common causes of blurry prints include:

• Insufficient PPI (less than 300 PPI for quality prints)
• Enlarging low-resolution images
• Wrong printer settings
• Poor quality original image

What's the relationship between megapixels and print size?

Here's a general guide for maximum print sizes at 300 PPI:

How do I resize images without losing quality?

Follow these best practices:

• Always save original high-resolution files
• Only resize downward, never upward
• Use proper image editing software
• Apply sharpening after resizing if needed
• Use the correct resampling method for your needs

What file format should I use for different purposes?

Common file format recommendations:

How do I prepare images for large format printing?

For large format printing:

• Consider viewing distance when choosing PPI
• Use 150-200 PPI for most large formats
• Check printer specifications
• Use CMYK color space
• Request a proof before final printing