Resize Image in Centimeters (cm), Millimeters (mm) & Inches
Resize photos to exact physical print dimensions: 3.5x4.5 cm, 2x2 inch, 4x6 inch at 300 DPI. Calculate exact pixels from centimeters and inches.
About this Preset
Official application forms, print studios, and passport authorities frequently specify dimensions in physical measurement units—such as 3.5 cm x 4.5 cm, 35 mm x 45 mm, or 2 x 2 inches—rather than pixels. Converting physical dimensions to pixels requires knowing the Dots Per Inch (DPI). At standard professional print quality (300 DPI), 1 inch equals 300 pixels, and 1 centimeter equals approximately 118.11 pixels. Our interactive physical dimension calculator translates centimeters, millimeters, or inches into exact pixel dimensions.
How to Resize in 4 Simple Steps
- Enter desired width and height in cm, mm, or inches.
- Set target DPI (300 DPI for high-res print, 150 DPI for web).
- The engine computes exact pixel boundaries and renders your file.
- Download your print-calibrated image file.
Frequently Asked Questions
How do you convert cm to pixels at 300 DPI?
Formula: Pixels = (Centimeters / 2.54) * DPI. For example, 3.5 cm at 300 DPI = (3.5 / 2.54) * 300 ≈ 413 pixels.
What DPI is required for passport and exam photos?
Most printing guidelines recommend 300 DPI for crisp photographic reproduction without visible pixelation.