Convert weight and mass units — kilograms, pounds, grams, ounces, tons, carats and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 μg | 5e-09 ct | |
| 0.01 μg | 5e-08 ct | |
| 0.1 μg | 5e-07 ct | |
| 1 μg | 5e-06 ct | |
| 5 μg | 2.5e-05 ct | |
| 10 μg | 5e-05 ct | |
| 50 μg | 0.00025 ct | |
| 100 μg | 0.0005 ct | |
| 1000 μg | 0.005 ct |
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 = 0.000005 ct
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) | Carat (ct) | Real-world context |
|---|---|---|
| 1 μg | 5.0000e-06 ct | speck of dust |
| 1000 μg | 0.005 ct | 1 milligram |
| 1,000,000 μg | 5 ct | |
| 1.0000e+09 μg | 5000 ct | |
| 1.0000e+12 μg | 5,000,000 ct |
1 microgram (μg) equals exactly 5.0000e-06 carats (ct). Use the formula: μg × 5.0000e-06 = ct.
To convert micrograms to carats, multiply your value in micrograms by 5.0000e-06. For example, 5 μg × 5.0000e-06 = 2.5000e-05 ct.
100 micrograms = 0.0005 carats. Calculation: 100 × 5.0000e-06 = 0.0005.
To convert carats back to micrograms, divide by 5.0000e-06 (or multiply by 200000). Example: 10 ct ÷ 5.0000e-06 = 2,000,000 μg.
Yes. This converter uses the internationally recognised exact conversion factor: 1 μg = 5.0000e-06 ct. All calculations are performed in your browser with no rounding until display.
10 micrograms = 5.0000e-05 carats. Simply multiply by 5.0000e-06.
Converting micrograms to carats is commonly needed for medical dosing, laboratory measurements, pharmaceutical calculations, and quality control testing where one system uses μg and another uses ct.
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 metric carat (ct) is the unit of mass used worldwide for gemstones and pearls, equal to exactly 200 milligrams (0.2 g). It is distinct from "karat" (K), the measure of gold purity (24K = 100% gold). A 1-carat diamond weighs exactly 0.2 g; the famous 45.52-carat Hope Diamond weighs approximately 9.1 g.
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.
The word "carat" derives from Greek keration (κεράτιον), meaning carob pod. Carob seeds were believed to have remarkably uniform weight and were used as counterweights for balancing precious stones. The carat value varied across countries (0.187–0.216 g) until the Fourth General Conference on Weights and Measures standardised the metric carat at exactly 200 mg in 1907. Most countries adopted the metric carat between 1914 and 1930.
Interesting fact: The largest gem-quality diamond ever found, the Cullinan Diamond (1905), weighed 3,106.75 carats (621.35 g) before being cut into 9 major and 96 minor stones, two of which are in the British Crown Jewels.