Online Ruler - Length Measuring Tool

This online ruler tool allows you to accurately measure the length of objects on your screen. Calibration with a credit card ensures precise measurement.

How to Use the Online Ruler

Please calibrate the ruler before use.

1. Place a credit card horizontally at the zero mark.

2. Enter the measured width of the card and click 'Calibrate'.

3. Now you can measure the desired object.

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Measure Objects with the Online Ruler

Tip: Use the blue handle at the bottom-right corner of the canvas to resize it.