🧪 mcg to mg Converter
Convert between micrograms (mcg) and milligrams (mg) using the standard metric mass relationship.
Converting micrograms to milligrams
Micrograms (mcg or µg) and milligrams (mg) are both metric units of mass, related by a factor of 1,000: there are 1,000 micrograms in 1 milligram, and 1,000 milligrams in 1 gram.
To convert micrograms to milligrams, divide by 1,000. To convert milligrams to micrograms, multiply by 1,000. This calculator performs the conversion instantly in either direction and also shows the equivalent value in grams.
This tool is intended for general planning and educational purposes. For any nutritional, supplement, or medication amounts, always follow the product label or a healthcare provider’s guidance rather than relying solely on a unit converter.
Last reviewed August 2026