MM to PX Converter
Convert millimeters to pixels instantly with customizable DPI settings. Perfect for web designers and developers who need to translate print specifications into pixel-perfect CSS values.
10mm × 96DPI ÷ 25.4 = 37.8px
Dots per inch, standard screen DPI is usually 96
MM to PX Quick Reference Chart (96 DPI Web Standard)
How to Use the MM to PX Converter
Converting millimeters to pixels is essential when translating print design specifications into web-ready CSS values. Our tool makes this conversion instant and accurate, whether you are working with brand guidelines, converting print layouts to digital, or ensuring cross-platform design consistency.
Enter Your Millimeter Value
Input the millimeter measurement from your design specifications. The tool accepts both whole numbers and decimals, so you can enter values like 50mm for a logo width or 7.5mm for precise spacing requirements.
Choose Your DPI Setting
Select the appropriate DPI based on your project needs. Use 96 DPI for standard web design (the default for most screens), or 300 DPI for high-quality print projects. The DPI setting directly impacts your pixel conversion result.
Get Your Pixel Value Instantly
The converter automatically calculates your result in real-time. Copy the value with units for direct use in CSS, or copy just the number for further calculations. Results are precise to two decimal places for maximum accuracy.
Understanding the MM to PX Conversion
Millimeters are physical measurement units used in print design, while pixels are digital display units used in web development. Understanding how to convert between these units is essential for maintaining design accuracy when moving from print specifications to screen-based implementations.
The MM to PX Conversion Formula
Example Calculation
50mm × 96 DPI ÷ 25.4
= 4800 ÷ 25.4
= 188.98px ≈ 189px
The constant 25.4 represents the number of millimeters in one inch. DPI (Dots Per Inch) determines how many pixels fit into one inch of screen space. For web design, 96 DPI is the standard, while print projects typically use 300 DPI for higher quality output.
Frequently Asked Questions About MM to PX Conversion
Get answers to common questions about converting millimeters to pixels for web design and development.
How do I convert millimeters to pixels?
To convert millimeters to pixels, use the formula: pixels = (millimeters × DPI) ÷ 25.4. The constant 25.4 represents millimeters per inch, and DPI (dots per inch) indicates pixel density. For example, to convert 10mm at 96 DPI: (10 × 96) ÷ 25.4 = 37.8 pixels. For web design, always use 96 DPI as the standard screen resolution.
Why should I convert MM to PX instead of using MM units in CSS?
While CSS technically supports millimeter units, they are unreliable for screen display because browsers must guess the monitor's physical pixel density. This results in inconsistent sizing across different devices. Converting to pixels ensures your designs display consistently. Millimeter units are only reliable for print stylesheets where physical dimensions matter.
What DPI should I use for web design versus print?
For web design, use 96 DPI, which is the CSS standard for screen display according to W3C specifications. This means approximately 96 pixels per inch. For print projects, use 300 DPI for high-quality output. The DPI value significantly affects conversion results: at 96 DPI, 1mm equals approximately 3.78px, while at 300 DPI, 1mm equals approximately 11.81px.
Should I round pixel values after conversion?
MM to PX conversions often produce decimal values because the units do not have a simple integer relationship. Modern browsers handle decimal pixels well through anti-aliasing. For most cases, keeping one decimal place provides good precision for CSS values. Round to the nearest whole number only if you need integer values for specific calculations or strict container sizing requirements.
When would I need to convert MM to PX in real projects?
Common scenarios include: translating brand guidelines that specify logo sizes in millimeters to CSS pixel values; converting print design layouts to digital banner ads; adapting physical product dimensions from CAD software to web specifications; and ensuring design consistency when moving between print collateral and website implementations. This conversion bridges the gap between physical design specifications and digital screen requirements.
Key Features of Our MM to PX Converter
A professional, free tool designed for web designers and developers
Real-Time Conversion
Get instant results as you type with no delays or registration required. Our converter calculates pixel values in real-time with precision up to two decimal places for maximum accuracy in your CSS implementations.
Customizable DPI Settings
Choose between 96 DPI for web design projects or 300 DPI for print work. Adjust DPI settings to match your specific project requirements and ensure accurate conversions for any use case.
Quick Copy Options
Copy results with CSS units included or as plain numbers with a single click. Perfect for pasting directly into your stylesheets or design tools without manual formatting.
Client-Side Processing
All calculations happen in your browser with no data sent to external servers. Your design specifications remain completely private and secure throughout the conversion process.
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Free, accurate, and instant millimeter to pixel conversion with customizable DPI settings. Perfect for web designers translating print specifications to pixel-perfect CSS.
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