Convert 500 micrograms to milligrams.

To convert micrograms to milligrams, it is important to understand the relationship between these two units of measurement. One milligram (mg) is equal to 1,000 micrograms (mcg or μg). Therefore, to convert micrograms to milligrams, you divide the number of micrograms by 1,000.

For this specific conversion, you take 500 micrograms and divide it by 1,000:

500 micrograms ÷ 1,000 = 0.5 milligrams.

This calculation shows that 500 micrograms is equivalent to 0.5 milligrams, which aligns perfectly with the correct answer. Understanding this conversion factor is crucial in medication math as it ensures proper dosing and administration of medications.