This tool performs mathematical unit conversions only. It does not suggest dosages or provide any recommendations for use. Understanding units does not enable safe dosing decisions.
Mass Unit Converter
Convert between micrograms (mcg), milligrams (mg), and grams (g).
Results
| Micrograms (mcg) | — |
|---|---|
| Milligrams (mg) | — |
| Grams (g) | — |
Conversion Reference
| From | To | Multiply by |
|---|---|---|
| mg | mcg | 1,000 |
| mcg | mg | 0.001 |
| g | mg | 1,000 |
| mg | g | 0.001 |
| g | mcg | 1,000,000 |
| mcg | g | 0.000001 |
About International Units (IU)
International Units cannot be universally converted because they measure biological activity, not mass. Each compound has its own IU definition.
For example:
- Growth hormone: approximately 3 IU ≈ 1 mg (varies by formulation)
- Insulin: has its own standardization
- Various peptides: each has unique IU definitions when applicable
Always verify the specific IU conversion for the compound in question. Using incorrect conversions can lead to significant errors.
Common Errors to Avoid
- Confusing mcg and mg — A 1000x difference
- Assuming universal IU conversions — Each compound differs
- Ignoring concentration vs. amount — mg/mL is not mg
- Decimal point errors — Double-check calculations