MeasureKite

Estimated scale · Calibrate first

Width - cmHeight - cm

↘Click and drag

Drag from one corner of an object to the opposite corner.

cm

How to use this online ruler

Reference sizesCreate a true-size guide on screen.

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Recent measurements

10-second setup for accurate results

Calibrate your screen

Place a credit card over the outline below. Adjust the slider until both edges align.

Standard credit card width: 8.56 cm

Adjust card width324 px

Both card edges must be visible before saving. Try landscape orientation or a larger screen. Do not shrink the outline just to make it fit: it must match your card.

Calibration is saved in this browser. Recalibrate after changing screens or browser zoom.