Online Ruler
Measure objects directly on your screen! Support both centimeter and inch units. Calibrate DPI for accurate measurements. Horizontal/vertical rotation and fullscreen mode available. Recommend calibrating with a real ruler or credit card (standard size 8.56cm) before use.
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💡 使用說明
- • Calibrate: Adjust DPI to match your screen
- • Usage Tips: 用實體尺或標準物品(如信用卡 8.5cm)校準
- • 信用卡標準尺寸: 8.56cm × 5.398cm (3.375" × 2.125")
- • 不同螢幕的 DPI 可能不同,建議在使用前先校準
- • 全螢幕模式下測量更準確