Question 1

How do I convert milligrams to micrograms?

Accepted Answer

Multiply by 1000. 1 mg = 1000 μg. Drug doses are often in mg; lab values may be in μg/dL.

Question 2

Why are micrograms written as mcg?

Accepted Answer

mcg avoids confusion with mg. μg is correct scientific notation, but mcg is clearer on prescriptions to prevent dosing errors.

Question 3

Is there a difference between mass and weight?

Accepted Answer

Yes! Mass (kg) is amount of matter, constant everywhere. Weight (newtons or pounds-force) is gravitational force on mass, varies by location.

Question 4

Why do jewelry and precious metals use different units?

Accepted Answer

Troy system (troy ounces, pennyweights) has been used for precious metals since the Middle Ages. 1 troy oz = 31.1g vs 1 regular oz = 28.35g.

mg to µg Converter

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