DisplayMetrics

About DisplayMetrics

Everything you want to know about a screen, an image or a print — in one place.

• Screen presets from iPhone to 65" 4K TV, or enter your own resolution and diagonal
• Instant PPI, dot pitch in mm, physical panel size, aspect ratio (reduced + decimal) and megapixels
• Recommended viewing distances for close work and relaxed viewing, plus the distance where pixels merge
• Print calculator: pixels + DPI = printed size in cm and inches
• Paper table: A4/A3/A5/Letter/photo sizes with the achieved DPI and a fit verdict for each
• Aspect ratio helper: pick a ratio, enter one side, get the other; ratio chips for 16:9, 4:3, 3:2, 21:9 and more
• Saved screens with names, copy any result as text

输入分辨率与对角线，立即得到 PPI、像素间距、物理尺寸、比例与推荐观看距离；打印页按 DPI 换算可打印尺寸并逐纸张评估成像；比例助手按已知边长换算另一边，支持保存与复制。