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Convert pixels to inches and centimeters with adjustable DPI/PPI settings. Essential for web designers, graphic designers, and print professionals.
Quick DPI Presets:
Conversion Formula:
inches = pixels ÷ DPI
cm = inches × 2.54
Example: 1920px ÷ 96 DPI = 20 inches
| Resolution | Pixels | @ 96 DPI (Web) | @ 300 DPI (Print) |
|---|---|---|---|
| HD (720p) | 1280 × 720 | 13.33" × 7.5" | 4.27" × 2.4" |
| Full HD (1080p) | 1920 × 1080 | 20" × 11.25" | 6.4" × 3.6" |
| 2K | 2560 × 1440 | 26.67" × 15" | 8.53" × 4.8" |
| 4K UHD | 3840 × 2160 | 40" × 22.5" | 12.8" × 7.2" |
| 5K | 5120 × 2880 | 53.33" × 30" | 17.07" × 9.6" |
| 8K UHD | 7680 × 4320 | 80" × 45" | 25.6" × 14.4" |
| iPhone 14/15 | 1170 × 2532 | 12.19" × 26.38" | 3.9" × 8.44" |
| iPad Pro 12.9" | 2048 × 2732 | 21.33" × 28.46" | 6.83" × 9.11" |
A pixel (picture element) is the smallest unit of a digital image or display. It's a single point in a raster image or on a screen. The total number of pixels determines the image resolution - a 1920×1080 image contains 2,073,600 pixels. Pixels are the fundamental building blocks of all digital imagery.
PPI (Pixels Per Inch) refers to the pixel density of digital displays and images. It measures how many pixels are displayed in one inch of screen space. Higher PPI means sharper, more detailed images on screens.
DPI (Dots Per Inch) technically refers to printer resolution - how many ink dots a printer can place in one inch. However, the terms are often used interchangeably in digital design. For screens, PPI is more accurate, but DPI is widely understood.
Web design typically uses 72-96 DPI since screens have fixed pixel densities. A 1920px wide image will display at about 20 inches on a standard 96 DPI monitor. Print design requires 300 DPI for quality results - the same 1920px image would only print at 6.4 inches wide, making it crucial to design at higher resolutions for print.
Divide the pixel measurement by the DPI (dots per inch). For example, 1920 pixels ÷ 96 DPI = 20 inches. The DPI value depends on your context: use 96 for web/screen display or 300 for print. The formula is: inches = pixels ÷ DPI.
For web design, use 72 or 96 DPI. Most modern displays use 96 DPI as the standard, though high-resolution displays like Retina screens have much higher pixel densities (200+ PPI). For web images, focus on pixel dimensions rather than DPI, as browsers display images based on pixel count.
Use 300 DPI for high-quality printing of photos and graphics. For large format prints (posters, banners) viewed from a distance, 150 DPI is often sufficient. Professional photo printing and fine art may use 600 DPI or higher. Never go below 150 DPI for print, as the quality will be noticeably poor.
For a 4×6 inch print at 300 DPI (standard quality), you need 1200×1800 pixels (4 inches × 300 DPI = 1200px, 6 inches × 300 DPI = 1800px). This equals 2.16 megapixels. For best results, always use 300 DPI when calculating dimensions for print.
For digital displays, pixel dimensions matter more than DPI. A 1920×1080 image will display the same size regardless of its DPI metadata. However, DPI becomes crucial when you want to convert between screen dimensions and physical sizes, or when preparing images for print. Modern high-DPI displays (Retina, 4K) have higher pixel densities but still display images based on pixel count.