1 mm = 1,000,000 nanometers
2 mm = 2,000,000 nanometers
2 mm = 2,000,000/30
there are 66,666.67 in 30 nanometers of 2mm
you may try below link to convert it to other units
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2 millimeters=2,000,000 nanometers
1 millimeter=1,000,000 nanometers
1 Angstrom = 0.1 nanometers
1.000 micrometers = 1,000 nanometers 0.600 micrometer = 600 nanometers
7.87 centimeters=78,700,000 nanometers