DPI / PPI Calculator

Calculate pixel density (DPI/PPI) for screens, prints, and images. Enter resolution and physical dimensions to get instant results.

Width Resolution (px)

Height Resolution (px)

Diagonal Size

Pixel Density

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PPI (Pixels Per Inch)

Physical Width: —

Physical Height: —

Total Pixels: —

Aspect Ratio: —

Image Width (px)

Image Height (px)

Print Width

Print Height

Print Resolution

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DPI (Dots Per Inch)

Horizontal DPI: —

Vertical DPI: —

Print Quality: —

Device Presets

Click a device to see its pixel density

Understanding DPI vs. PPI

What's the Difference?

PPI (Pixels Per Inch): Used for screens and digital displays. Measures how many pixels fit in one inch of screen space.
DPI (Dots Per Inch): Used for printing. Measures how many ink dots a printer can place in one inch.
Higher PPI = sharper screen. Higher DPI = better print quality.

Common DPI/PPI Standards

Use Case	Recommended DPI/PPI	Notes
Web Images	`72 PPI`	Standard for digital displays
High-Res Screens (Retina)	`220+ PPI`	Apple Retina displays start at ~220 PPI
Photo Prints (Standard)	`150-200 DPI`	Acceptable for home/consumer prints
Photo Prints (High Quality)	`300 DPI`	Professional print standard
Large Format (Posters, Billboards)	`100-150 DPI`	Viewed from distance, lower DPI acceptable
Magazine/Book Printing	`300-600 DPI`	Higher for fine details and text

How DPI Affects File Size

Doubling the DPI quadruples the file size. A 10×8" image at 300 DPI (3000×2400 pixels) is 4× larger than the same image at 150 DPI (1500×1200 pixels).

Screen PPI Examples

iPhone 17 Pro: ~460 PPI — Ultra-sharp "Super Retina XDR"
MacBook Pro 16": 254 PPI — Apple's "Retina" standard
4K Monitor (27"): 163 PPI — High-res desktop display
1080p Monitor (24"): 92 PPI — Standard office monitor