Online PPI Calculator

Calculate Pixels Per Inch (PPI) for screens and images instantly with our free online PPI calculator.

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About This Tool

Our Online PPI Calculator helps you determine the pixel density (Pixels Per Inch) of any screen, display, or digital image. Simply enter the width and height in pixels, along with the diagonal size in inches or centimeters, and get instant PPI calculation results. This tool is perfect for designers, photographers, and tech enthusiasts who need to understand display quality and image resolution. The calculator also provides additional useful metrics like total pixels and aspect ratio.

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How to Use

Enter the width of your screen/image in pixels
Enter the height of your screen/image in pixels
Enter the diagonal size of your screen/image
Select whether the diagonal size is in inches or centimeters
Click the 'Calculate PPI' button
View your PPI result along with total pixels and aspect ratio

Frequently Asked Questions

Find Quick Answers

What is PPI?

PPI stands for Pixels Per Inch, which measures the pixel density of a digital screen or image. Higher PPI means sharper and more detailed display quality.

How is PPI calculated?

PPI is calculated using the formula: PPI = √(width² + height²) / diagonal size. The diagonal size must be in inches for accurate PPI calculation.

Can I calculate PPI for centimeters?

Yes! Our calculator automatically converts centimeters to inches when you select 'cm' as the unit, ensuring accurate PPI calculation regardless of your measurement unit.

What's a good PPI value?

For smartphones, 300+ PPI is considered good. For computer monitors, 100-200 PPI is typical. For printing, 300 PPI is standard for high-quality prints.

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