What DPI is needed for photos vs computer screens?

Computer and smartphone screens typically display content at 72 to 144 DPI. Physical prints require at least 150 DPI for fair office quality, and 300 DPI for sharp, professional photo prints.

How do I calculate pixel dimensions from physical sizes?

Multiply your physical size in inches by your target DPI: Pixels = Inches × DPI. For example, a 4 × 6 inch photo at 300 DPI requires 1200 × 1800 pixels.

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Resolution & Dimension Utility

DPI + Print Size Calculator

Convert image pixels to physical print dimensions in inches, cm, and mm. Calculate required pixel resolutions for crisp 300 DPI prints with zero guesswork.

Calculate Print Dimensions from Pixels

Find out how large your image will print cleanly at various resolutions

Auto-Read from Image

Pixel Width

Pixel Height

Resolution (DPI / PPI)

Calculated Physical Print Dimensions

High Quality Photo Print

Inches

6″ × 4″

Centimeters (cm)

15.24 × 10.16 cm

Millimeters (mm)

152 × 102 mm

Total pixel resolution: 1800 × 1200 px (2.16 Megapixels)

Frequently Asked Questions

Helpful answers to common image compression questions.

DPI (Dots Per Inch) or PPI (Pixels Per Inch) determines how many pixels fit into an inch of printed paper. Higher DPI means finer detail. 300 DPI is the universal benchmark for crisp, photographic-quality printing.