Grams to mcg Converter

How to convert grams to micrograms

Formulaµg = g × 1,000,000

Multiply the value in grams by 1,000,000. To go the other way, multiply by 0.000001 (or divide by 1,000,000).

A gram is larger than a microgram: one gram contains 1,000,000 micrograms.

Worked examples

1 gram1 g × 1,000,000 = 1,000,000 µg
5 grams5 g × 1,000,000 = 5,000,000 µg
10 grams10 g × 1,000,000 = 10,000,000 µg
20 grams20 g × 1,000,000 = 20,000,000 µg
100 grams100 g × 1,000,000 = 100,000,000 µg

Grams to micrograms conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Grams to micrograms: 0.1–10 g
Grams (g)	Micrograms (µg)
0.1 g	100,000 µg
0.25 g	250,000 µg
0.5 g	500,000 µg
1 g	1,000,000 µg
2 g	2,000,000 µg
3 g	3,000,000 µg
4 g	4,000,000 µg
5 g	5,000,000 µg
6 g	6,000,000 µg
7 g	7,000,000 µg
8 g	8,000,000 µg
9 g	9,000,000 µg
10 g	10,000,000 µg

Grams to micrograms: 12–1,000 g
Grams (g)	Micrograms (µg)
12 g	12,000,000 µg
15 g	15,000,000 µg
20 g	20,000,000 µg
25 g	25,000,000 µg
30 g	30,000,000 µg
40 g	40,000,000 µg
50 g	50,000,000 µg
75 g	75,000,000 µg
100 g	100,000,000 µg
250 g	250,000,000 µg
500 g	500,000,000 µg
1,000 g	1,000,000,000 µg

About the units

Gram (g)

One thousandth of a kilogram. Recipes, nutrition labels and postal scales use grams; a US nickel weighs 5 g. One gram equals 0.001 kilograms (kg).

Microgram (µg)

One millionth of a gram, often written “mcg” on supplement labels to avoid confusion with mg. One microgram equals 1×10⁻⁹ kilograms (kg).

Frequently asked questions

How many micrograms are in one gram?

There are 1,000,000 micrograms in one gram, and this value is exact by definition.

How do I convert grams to micrograms?

Multiply the number of grams by 1,000,000. For example, 10 g × 1,000,000 = 10,000,000 µg.

How many grams are in one microgram?

One microgram equals 0.000001 grams. That is the reverse factor, 1 ÷ 1,000,000.

What is 10 grams in micrograms?

10 g = 10,000,000 µg.

Is this g to µg converter accurate?

Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.