Convert weight and mass units — kilograms, pounds, grams, ounces, tons, carats and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 μg | 1e-06 mg | |
| 0.01 μg | 1e-05 mg | |
| 0.1 μg | 0.0001 mg | |
| 1 μg | 0.001 mg | |
| 5 μg | 0.005 mg | |
| 10 μg | 0.01 mg | |
| 50 μg | 0.05 mg | |
| 100 μg | 0.1 mg | |
| 1000 μg | 1 mg |
The Milligram (mg) and the Gram (g) are both units of weight & mass. Converting between them is straightforward using the formula above.
Formula: 1 μg = 0.001 mg
This converter uses internationally recognized conversion factors. All calculations are performed client-side in your browser — no data is sent to any server.
| Microgram (μg) | Milligram (mg) | Real-world context |
|---|---|---|
| 1 μg | 0.001 mg | speck of dust |
| 100 μg | 0.1 mg | visible particle |
| 1000 μg | 1 mg | 1 milligram |
| 10000 μg | 10 mg | |
| 100000 μg | 100 mg |
1 microgram (μg) equals exactly 0.001 milligrams (mg). Use the formula: μg × 0.001 = mg.
To convert micrograms to milligrams, multiply your value in micrograms by 0.001. For example, 5 μg × 0.001 = 0.005 mg.
100 micrograms = 0.1 milligrams. Calculation: 100 × 0.001 = 0.1.
To convert milligrams back to micrograms, divide by 0.001 (or multiply by 1000). Example: 10 mg ÷ 0.001 = 10000 μg.
Yes. This converter uses the internationally recognised exact conversion factor: 1 μg = 0.001 mg. All calculations are performed in your browser with no rounding until display.
10 micrograms = 0.01 milligrams. Simply multiply by 0.001.
Converting micrograms to milligrams is commonly needed for medical dosing, laboratory measurements, pharmaceutical calculations, and quality control testing where one system uses μg and another uses mg.
The microgram (μg, or mcg in medical writing) is a unit of mass equal to one-millionth of a gram (10⁻⁶ g) or one-billionth of a kilogram (10⁻⁹ kg). The symbol "μ" is the Greek letter mu, representing the SI micro- prefix. In clinical settings "mcg" is preferred over "μg" to avoid handwriting confusion between μ and m.
The milligram (mg) is a unit of mass equal to one-thousandth of a gram (0.001 g) or one-millionth of a kilogram (10⁻⁶ kg). It is the standard unit for drug dosing in medicine and pharmacology, where precise small quantities are critical for safety and efficacy. The prefix "milli-" comes from Latin mille meaning one thousand.
The microgram became essential in the 20th century as analytical chemistry techniques — mass spectrometry, HPLC, immunoassay — allowed measurement and manipulation at sub-milligram scales. Vitamins, hormones, and pharmaceuticals are often active at microgram levels. The discovery that iodine deficiency (corrected by just a few hundred micrograms daily) causes goitre and intellectual disability was a landmark 20th-century public health finding.
Interesting fact: The human daily requirement for vitamin B12 is only 2.4 μg, yet deficiency causes irreversible neurological damage. Vitamin D3 requirement is approximately 15 μg per day.
Established as a derived unit when the metric system was formalised in the late 18th century. The milligram rose to critical importance with the growth of pharmacology in the 19th and 20th centuries, as chemists isolated active compounds and found that tiny quantities produced strong therapeutic — or toxic — effects. Modern pharmacopoeias worldwide specify drug doses in milligrams.
Interesting fact: A single grain of table salt weighs about 58 mg. One standard 325 mg aspirin tablet means that 1,000 tablets weigh only 325 grams — less than a can of soft drink.