- 1). Enter the numerical value of the mass you wish to convert, measured in mg, into the calculator. For example, if you wanted to convert a mass of 25 mg, you would enter 25.
- 2). Multiply the value you just entered by 1,000. This is the conversion factor between mg and µg, since there are 1,000 µg in 1 mg. In the case of the example, you would multiply 25 by 1,000 to obtain 25,000.
- 3). Report the result of the calculation as the mass in units of µg. The mass in the example, for instance, would be reported as 25,000 µg.
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