As we know One pixel/m is equal to 0.001 dot/mm (1 pixel/m = 0.001 dot/mm).

To convert Pixel/Meter to Dot/Millimeter, multiply your pixel/m figure by 0.001.

Example : convert 25 pixel/m to dot/mm:

25 pixel/m = 25 × 0.001 dot/mm = dot/mm

To convert Dot/Millimeter to Pixel/Meter, divide your dot/mm figure by 0.001.

Example : convert 25 dot/mm to pixel/m:

25 dot/mm = 25 ÷ 0.001 pixel/m = pixel/m