Milligrams to Micrograms Converter
Convert milligrams to micrograms (mcg). Multiply by 1,000—1 mg = 1,000 mcg. For vitamin doses, lab samples, and pharmacy precision.
How to Convert Milligrams to Micrograms
Multiply milligrams by 1,000 (1 mg = 1,000 mcg).
Conversion Formula:
value * 1000Conversion Examples
Example: 1 mg to mcg
- 1 × 1,000 = 1,000 mcg
1,000 mcg
Exact factor.
Example: 2.5 mg to mcg
- 2.5 × 1,000 = 2,500 mcg
2,500 mcg
Decimal dose.
Conversion Chart
| Milligrams | Micrograms |
|---|---|
| 0.1 | 100 |
| 0.5 | 500 |
| 1 | 1000 |
| 2 | 2000 |
| 5 | 5000 |
| 10 | 10000 |
| 25 | 25000 |
| 50 | 50000 |
| 100 | 100000 |
Conversion Formula
Multiply milligrams by **1,000** for micrograms.
Quick Conversion Tip
mg × 1,000 = mcg. Example: 5 mg = 5,000 mcg.
Unit Definitions
Milligram (mg)
A milligram is a metric unit of mass equal to one thousandth of a gram. It is commonly used for small weights in medicine, chemistry, and nutrition.
1 milligram = 1000 micrograms = 0.001 grams = 0.000001 kilograms
Microgram (mcg)
A microgram is a metric unit of mass equal to one millionth of a gram. It is used for extremely small measurements in pharmacology and scientific research.
1 microgram = 0.001 milligrams = 0.000001 grams = 0.000000001 kilograms
Common Use Cases
- Vitamin and supplement labels.
- Pharmacy compounding.
- Analytical chemistry samples.
- Teaching metric prefixes.
Understanding the Conversion
1 mg = 1,000 mcg (μg). Multiply mg by 1,000.
Examples: 1 mg = 1,000 mcg; 0.5 mg = 500 mcg. Common for supplements and lab trace amounts.
Divide mcg by 1,000 for mg.
Vitamin and supplement labels. The table and FAQ on this page walk through the factor if you need it.
FAQs
How many mcg in one milligram?
Exactly 1,000 micrograms.
How do I convert mg to mcg?
Multiply milligrams by 1,000.
Is mcg the same as μg?
Yes—both mean microgram.