CM to Pixels Converter (CM to PX)

Formula & Quick Examples

The conversion from centimeters to pixels is based on a simple formula that uses your display or print resolution (PPI):

Pixels = (CM × PPI) ÷ 2.54

Why divide by 2.54? Because one inch equals exactly 2.54 centimeters. This ensures accuracy whether you are working on web projects or preparing files for high-quality printing.

Quick Examples

• 1 cm in pixel (at 96 PPI): 1 × 96 ÷ 2.54 ≈ 38 pixels
• 2 cm in pixels (at 96 PPI): 2 × 96 ÷ 2.54 ≈ 76 pixels
• 10 cm in pixels (at 300 PPI): 10 × 300 ÷ 2.54 ≈ 1181 pixels

These examples give you a quick reference to understand how dimensions scale at different resolutions. For web graphics, 96 PPI is the common standard, while for print, 300 PPI or higher is recommended.

CM to Pixels Conversion Chart (96 PPI)

Use this quick cm to pixels conversion chart to find common values at 96 PPI. This helps designers and developers quickly estimate pixel sizes from centimeter dimensions without manual calculations.

Reverse Conversion: Pixels to CM

Sometimes you need to do the opposite and convert pixels to centimeters.
The formula is simply reversed:

CM = (Pixels × 2.54) ÷ PPI

✅ Quick examples at 96 PPI:

• 100 pixels ÷ 96 × 2.54 = ~2.65 cm
• 1000 pixels ÷ 96 × 2.54 = ~26.46 cm
• 1024 pixels ÷ 96 × 2.54 = ~27.06 cm

Special Use Cases for CM to Pixels Conversion

(A) Photo & ID Sizes

One of the most common needs for a cm to pixels conversion is ID photos.
For example, the standard passport photo size is 3.5 × 4.5 cm in pixels,
which equals about 132 × 170 px @96 PPI or 413 × 531 px @300 PPI.

Another frequent case is a 4×6 cm photo in pixels, often used for forms and IDs.
At 300 DPI, this size equals about 472 × 709 pixels.

(B) A4 Paper Conversion

An A4 size in cm is exactly 21 × 29.7 cm.
When converted to pixels, it depends on the resolution you choose:

• A4 in pixels @96 PPI → ~794 × 1123 px
• A4 in pixels @300 PPI → ~2480 × 3508 px

These values are widely used in graphic design and printing setups, especially when preparing files for professional print shops.

(C) Printing at Different DPI

Screen images are usually shown at 96 PPI, but high-quality prints require 300 DPI or more.
This is why cm to pixels 300 DPI calculations are critical.
For example, a 10 cm image converts to ~378 px @96 PPI but jumps to ~1181 px @300 DPI.
Always check your target resolution before printing to avoid blurry or low-quality results.

FAQs

How many pixels is 1 cm?

At 96 PPI, 1 cm ≈ 37.8 px. At 300 PPI, 1 cm ≈ 118.1 px. Use: Pixels = (CM × PPI) ÷ 2.54.

How many pixels is 4.5 cm by 3.5 cm?

@96 PPI ≈ 170 × 132 px. @300 PPI ≈ 531 × 413 px. Order is width × height.

How many centimeters is 2000 pixels?

CM = (Pixels × 2.54) ÷ PPI. @96 PPI ≈ 52.9 cm. @300 PPI ≈ 16.9 cm.

How many pixels is 4×6 cm?

@96 PPI ≈ 151 × 226 px. @300 PPI ≈ 472 × 709 px.

What is A4 in pixels?

A4 = 21 × 29.7 cm. @96 PPI ≈ 794 × 1123 px. @300 PPI ≈ 2480 × 3508 px.

What’s the difference between PPI and DPI?

PPI is pixel density of the image/display. DPI is printer dot density. For conversions, use PPI.

Which PPI should I use?

Web/UI: 96 PPI (typical). High-quality print: 300 PPI or more. Always match your target output.

How do I find my screen PPI?

Check device specs or use an online PPI checker by entering screen size (inches) and resolution (pixels).

What is 1024×1024 pixels in cm?

At 96 PPI ≈ 27.1 × 27.1 cm. At 300 PPI ≈ 8.7 × 8.7 cm. Use CM = (Pixels × 2.54) ÷ PPI.

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