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Todas las Calculadoras
Sobre Nós
Blog hub

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Todas las Calculadoras
Sobre Nós
Blog hub

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Ruler

Draggable Show inch Show cm Canvas mode Zero at center Crosshair Pin mode Vertical Center guide Edge guides Grid Magnifier Snap sounds

Calibrate: Measure a known object (e.g., a credit card is ~8.56 cm wide). Adjust the slider if needed.

1.00

Detecting your screen...

Calibrate in 10 seconds

Pick your monitor size or keep Auto.
Use Quick calibrate and drag the bar to match a credit card.
Fine‑tune with the slider if needed.

Quick calibration objects

Credit card width: 85.60 mm (3.370 in)
Credit card height: 53.98 mm (2.125 in)
A4 short edge: 210 mm
US Letter short edge: 8.5 in

You can also drag the zero handle, add pins, and switch to vertical mode.

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