Use the interactive mg ↔ mcg converter
One milligram equals one thousand micrograms. The calculator converts mcg values to mg internally so vial and dose amounts use a consistent unit.
1 mg = 1,000 mcg
Common mg and mcg conversions
| Milligrams (mg) | Micrograms (mcg) |
|---|---|
| 0.1 mg | 100 mcg |
| 0.25 mg | 250 mcg |
| 0.5 mg | 500 mcg |
| 1 mg | 1,000 mcg |
| 5 mg | 5,000 mcg |
| 10 mg | 10,000 mcg |
Convert mg to mcg
Multiply the mg value by 1,000.
mcg = mg × 1,000
Convert mcg to mg
Divide the mcg value by 1,000.
mg = mcg ÷ 1,000
Using units in the app
- Enter the numeric vial amount and select the unit shown on the vial.
- Enter the independently determined dose value and select its unit.
- Confirm both unit selectors before reading the concentration, volume, and syringe-unit result.
The app includes warnings intended to draw attention to values that may reflect an accidental mg/mcg mismatch. A warning does not establish whether a value is medically appropriate.