Convert weight and mass units — kilograms, pounds, grams, ounces, tons, carats and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 mg | 1 μg | |
| 0.01 mg | 10 μg | |
| 0.1 mg | 100 μg | |
| 1 mg | 1000 μg | |
| 5 mg | 5000 μg | |
| 10 mg | 10000 μg | |
| 50 mg | 50000 μg | |
| 100 mg | 100000 μg | |
| 1000 mg | 1e+06 μg |
The Milligram (mg) and the Gram (g) are both units of weight & mass. Converting between them is straightforward using the formula above.
Formula: 1 mg = 1000 μg
This converter uses internationally recognized conversion factors. All calculations are performed client-side in your browser — no data is sent to any server.
| Milligram (mg) | Microgram (μg) | Real-world context |
|---|---|---|
| 0.001 mg | 1 μg | |
| 0.01 mg | 10 μg | |
| 0.1 mg | 100 μg | |
| 1 mg | 1000 μg | |
| 10 mg | 10000 μg |
1 milligram (mg) equals exactly 1000 micrograms (μg). Use the formula: mg × 1000 = μg.
To convert milligrams to micrograms, multiply your value in milligrams by 1000. For example, 5 mg × 1000 = 5000 μg.
100 milligrams = 100000 micrograms. Calculation: 100 × 1000 = 100000.
To convert micrograms back to milligrams, divide by 1000 (or multiply by 0.001). Example: 10 μg ÷ 1000 = 0.01 mg.
Yes. This converter uses the internationally recognised exact conversion factor: 1 mg = 1000 μg. All calculations are performed in your browser with no rounding until display.
10 milligrams = 10000 micrograms. Simply multiply by 1000.
Converting milligrams to micrograms is commonly needed for medical dosing, laboratory measurements, pharmaceutical calculations, and quality control testing where one system uses mg and another uses μg.
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 (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.
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.
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.