Please calibrate your ruler.
An
online ruler
with
centimeters
and
inches
.
Tips:
Drag to move the ruler
;
Ctrl
-drag to rotate.
Options:
centimeters.
inches.
flipped.
Choose your calibration object. Once you’ve chosen your calibration object, then hold it up to the screen and click where the edge is.
Credit card
US dollar
Sheet of paper:
Letter
,
A4
Some other object you know the length of:
cm
in
×
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