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Viewport, PPI & CSS Media Query Calculator

Calculate display aspect ratios, PPI pixel density, dot pitch, and responsive CSS media queries for mobile, tablet, desktop, and retina screens.

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📐Viewport, PPI & CSS Media Query Calculator Documentation & Guide

Calculators
The Viewport, PPI & Media Query Calculator analyzes display dimensions to calculate simplified aspect ratios, physical vs. logical CSS resolution, total rendered megapixels, pixel density (PPI/DPI), dot pitch, and generates copyable responsive CSS media queries and modern aspect-ratio properties.

📋How to Calculate Viewport & Display Properties

  1. Enter Resolution: Enter CSS logical viewport width and height in pixels, or select a device preset (Mobile, Tablet, Laptop, 4K UHD, Ultrawide).
  2. Select Device Pixel Ratio: Set DPR scaling factor (1x standard, 2x Apple Retina/4K, 3x Super Retina) to evaluate physical device pixels.
  3. Add Diagonal Size (Optional): Enter the physical display diagonal in inches (e.g. 6.1", 14", 24", 27") to calculate pixel density and dot pitch.
  4. Copy Media Queries: Click 📐 Calculate Viewport & Media Queries to compute metrics and copy min-width, max-width, and retina CSS queries.

⚙️Display Mathematics & Responsive Breakpoint Formulas

Modern responsive web design bridges logical CSS pixels with high-density physical screen hardware:

• Aspect Ratio Simplification: Uses the Euclidean Greatest Common Divisor (GCD) algorithm: aspect = (W ÷ gcd(W,H)) : (H ÷ gcd(W,H)).
• Physical vs Logical Pixels: Hardware pixels = (CSS Width × DPR) × (CSS Height × DPR). Total megapixels = Hardware Pixels ÷ 1,000,000.
• Pixel Density (PPI): PPI = √(Width_phys² + Height_phys²) ÷ Diagonal_inches. Dot pitch = 25.4 ÷ PPI (in millimeters).
• High-DPI Query Standards: Generates cross-browser retina breakpoints utilizing both -webkit-min-device-pixel-ratio and standard min-resolution (DPR × 96 dpi).

💡Practical Use Cases & Responsive Engineering

  • Responsive Breakpoint Planning: Formulate container queries and viewport media queries matching actual user device matrices.
  • Retina & Asset Optimization: Determine exact 2x and 3x raster image dimensions to avoid blurry graphics on Apple Retina and Android OLED screens.
  • Display Hardware Evaluation: Verify pixel density (PPI) and physical dot pitch when comparing monitors, laptops, and tablets.
100% Client-Side Privacy Guarantee:All viewport geometry calculations and screen detection queries execute entirely inside your local browser runtime. Zero hardware telemetry is transmitted externally.
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