Convert Micrograms to Milligrams
Convert Micrograms (µg) to Milligrams (mg) instantly and accurately.
Conversion Formula
mg = µg × 0.001
About Micrograms
A microgram (µg or mcg) is one millionth of a gram (10⁻⁶ g). It is the standard dosing unit for potent medications and micronutrients: vitamin B12 recommended daily intake is 2.4 µg, folic acid supplements are 400 µg, and levothyroxine (thyroid medication) doses are typically 25-200 µg. Air quality standards measure fine particulate matter (PM2.5) in micrograms per cubic meter - the WHO guideline is 15 µg/m³ annual mean. A grain of sand weighs about 50-100 micrograms, and a single snowflake approximately 3 micrograms.
About Milligrams
A milligram (mg) is one thousandth of a gram (10⁻³ g). It is the primary unit for pharmaceutical dosing: aspirin tablets are typically 500 mg, ibuprofen 200-400 mg, and melatonin supplements 0.5-10 mg. Precious metal assay results and alloy compositions are specified in milligrams per kilogram (mg/kg = ppm). Nutritional labels worldwide list mineral content in milligrams - the recommended daily intake of iron is 8-18 mg, calcium 1000 mg, and sodium under 2300 mg. A grain of rice weighs about 25-30 mg, and a medium eyelash approximately 0.1 mg.
Quick Reference Table
| Micrograms (µg) | Milligrams (mg) |
|---|---|
| 1 µg | 0.001 mg |
| 2 µg | 0.002 mg |
| 5 µg | 0.005 mg |
| 10 µg | 0.01 mg |
| 25 µg | 0.025 mg |
| 50 µg | 0.05 mg |
| 100 µg | 0.1 mg |