You can change the ruler unit from inches to centimeters, millimeters, points, and Picas. Points are used when you need to simulate pixels, while Picas are typically used to represent fixed ...

How many millimeters are in an inch? There are 25.4 millimeters in one inch. How many kilometers are in a mile? There are about 1.61 kilometers in a mile.

GIMP allows you to temporarily change the ruler's units, however, to inches, millimeters, picas, points, centimeters, meters, feet or yards if you prefer. Launch the GIMP image editing application.

Centimeter markings are ideal, but it’s OK if you don’t have a metric ruler or tape. Just be sure to multiply each measurement in inches by 2.54 to get the equivalent number in centimeters.