Medical Dose Converter
Micrograms, milligrams and grams — the 1000× steps where a decimal slip matters.
Medical Dose Converter
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Units in this category
| Unit | Symbol | Exactly |
|---|---|---|
| micrograms (µg) (mcg) | mcg | 0.001 mg |
| milligrams (mg) | mg | reference unit for this category |
| grams (g) | g | 1,000 mg |
Where these factors come from
Prescription mass units step by exactly 1000: 1 g = 1000 mg, 1 mg = 1000 mcg. The conversions here are exact unit arithmetic; what dose is right for a person is a medical question.
All 6 medical dose pairs
Conversions by starting unit
micrograms (µg) (mcg)
milligrams (mg)
grams (g)
Common questions
Is mcg the same as µg?
Yes — both mean microgram, one thousandth of a milligram. Some labels write ug when µ is unavailable; the meaning is identical.
How many micrograms in 0.1 mg?
Exactly 100 mcg — multiply milligrams by 1000. Every value page shows the multiplication explicitly.
Can I use this for dosing?
This site converts units, exactly. What dose is right for you is a medical question — confirm with your prescriber or pharmacist.