Milligrams to Micrograms converter (mg to mcg)
Convert Milligrams (mg) to Micrograms (mcg) with this free calculator. Type a value, press Convert, and the page applies the same factor shown in the formula below — no rounded shortcut, and nothing is stored on a server.
How to convert Milligrams to Micrograms
1 milligram (mg) is equal to 1000 micrograms (mcg).
1 mg = 1000 mcg
The mass m in micrograms (mcg) is equal to the mass m in milligrams (mg) multiplied by 1000:
Example: Convert 5 mg to micrograms:
m(mcg) = 5 mg × 1000 = 5000 mcg
What is a Milligrams?
The milligram (mg) is one-thousandth of a gram. Medicine doses and trace lab measurements are typically written in milligrams.
What is a Micrograms?
The Micrograms (mcg) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
This page converts mass from Milligrams into Micrograms. One mg equals 1000 mcg.
Milligrams to Micrograms conversion table
Common mg values and the matching mcg result, calculated with the same factor as the widget. Highlight a nearby row if you want a quick check without entering a number.
| Milligrams (mg) | Micrograms (mcg) |
|---|---|
| 0 mg | 0 mcg |
| 0.1 mg | 100 mcg |
| 0.5 mg | 500 mcg |
| 1 mg | 1000 mcg |
| 2 mg | 2000 mcg |
| 3 mg | 3000 mcg |
| 4 mg | 4000 mcg |
| 5 mg | 5000 mcg |
| 6 mg | 6000 mcg |
| 7 mg | 7000 mcg |
| 8 mg | 8000 mcg |
| 9 mg | 9000 mcg |
| 10 mg | 10000 mcg |
| 20 mg | 20000 mcg |
| 50 mg | 50000 mcg |
| 100 mg | 100000 mcg |
| 500 mg | 500000 mcg |
| 1000 mg | 1000000 mcg |
How this calculator works
The form on this page is a Milligrams-to-Micrograms converter. After you enter a number, JavaScript multiplies or rearranges it with the published conversion factor and writes the mcg result in the output box. The step-by-step panel repeats the arithmetic so you can copy it into homework or a spreadsheet.
Reviewed by Hamsen, founder of GigaTables and a biology engineer. See the about page for how formulas are checked before a tool is published.
FAQ
How many mcg are in 1 mg?
1 mg = 1000 mcg.
How do I convert Milligrams to Micrograms?
The mass m in micrograms (mcg) is equal to the mass m in milligrams (mg) multiplied by 1000:
Is this mg to mcg converter free?
Yes. GigaTables calculators are free to use in a browser. You do not need an account, and the values you type are not uploaded.