How to convert micrograms to grams
To convert a measurement in micrograms to grams, multiply the value by 0.000001. The conversion factor comes from the relationship between both units and the kilogram.
For example, to convert 5 µg to grams: 5 × 0.000001 = 0.000005 g.
What is a microgram?
A microgram is a metric unit of mass equal to one millionth of a gram (0.000001 g) or one billionth of a kilogram. The microgram (sometimes abbreviated 'mcg' in medicine to avoid confusion with 'mg') became important with the discovery of vitamins and hormones that are active in tiny quantities. The prefix 'micro' comes from the Greek for 'small'.
Common uses of micrograms include: Vitamin and trace-mineral dosages (e.g. vitamin D, B12); Hormone and potent drug amounts; Environmental contaminant concentrations; Analytical chemistry and toxicology.
What is a gram?
A gram is a metric unit of mass equal to one thousandth of a kilogram (0.001 kg) or about 0.035 ounces. Defined in 1795 as the mass of one cubic centimeter of water at the temperature of melting ice. The gram is the base for many everyday metric masses and the reference point for nutritional labeling worldwide.
Common uses of grams include: Cooking and recipe ingredient quantities; Nutrition labels and food portions; Postage and small parcel weight; Jewelry and precious metal weighing.
Micrograms to grams worked examples
Here are some common values converted:
1 µg = 0.000001 g 5 µg = 0.000005 g 10 µg = 0.00001 g 50 µg = 0.00005 g 100 µg = 0.0001 g
Frequently asked questions
How many grams are in one microgram?
One microgram (µg) equals 0.000001 grams (g). Multiply any value in micrograms by 0.000001 to convert to grams.
How do I convert micrograms to grams?
Multiply the value in micrograms by 0.000001. For example, 5 µg × 0.000001 = 0.000005 g.
How do I convert grams to micrograms?
Multiply the value in grams by 1,000,000, or divide by 0.000001. Use the swap button on the converter above to reverse the direction.
Is the microgram to gram conversion exact?
Yes. Since 1959 the international pound is defined as exactly 0.45359237 kg, so all weight conversions between metric and avoirdupois units use exact factors.
What is the formula for micrograms to grams?
The formula is: g = µg × 0.000001. This comes from the definition of both units relative to the kilogram.