mcg to kg Converter

How to convert micrograms to kilograms

Formulakg = µg × 1×10⁻⁹

Multiply the value in micrograms by 1×10⁻⁹. To go the other way, multiply by 1,000,000,000 (or divide by 1×10⁻⁹).

A microgram is smaller than a kilogram: it takes 1,000,000,000 micrograms to make one kilogram.

Worked examples

1 microgram1 µg × 1×10⁻⁹ = 1×10⁻⁹ kg
5 micrograms5 µg × 1×10⁻⁹ = 5×10⁻⁹ kg
10 micrograms10 µg × 1×10⁻⁹ = 1×10⁻⁸ kg
20 micrograms20 µg × 1×10⁻⁹ = 2×10⁻⁸ kg
100 micrograms100 µg × 1×10⁻⁹ = 1×10⁻⁷ kg

Micrograms to kilograms conversion table

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

Micrograms to kilograms: 0.1–10 µg
Micrograms (µg)	Kilograms (kg)
0.1 µg	1×10⁻¹⁰ kg
0.25 µg	2.5×10⁻¹⁰ kg
0.5 µg	5×10⁻¹⁰ kg
1 µg	1×10⁻⁹ kg
2 µg	2×10⁻⁹ kg
3 µg	3×10⁻⁹ kg
4 µg	4×10⁻⁹ kg
5 µg	5×10⁻⁹ kg
6 µg	6×10⁻⁹ kg
7 µg	7×10⁻⁹ kg
8 µg	8×10⁻⁹ kg
9 µg	9×10⁻⁹ kg
10 µg	1×10⁻⁸ kg

Micrograms to kilograms: 12–1,000 µg
Micrograms (µg)	Kilograms (kg)
12 µg	1.2×10⁻⁸ kg
15 µg	1.5×10⁻⁸ kg
20 µg	2×10⁻⁸ kg
25 µg	2.5×10⁻⁸ kg
30 µg	3×10⁻⁸ kg
40 µg	4×10⁻⁸ kg
50 µg	5×10⁻⁸ kg
75 µg	7.5×10⁻⁸ kg
100 µg	1×10⁻⁷ kg
250 µg	2.5×10⁻⁷ kg
500 µg	5×10⁻⁷ kg
1,000 µg	0.000001 kg

About the units

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).

Kilogram (kg)

The SI base unit of mass, defined since 2019 through the Planck constant. A litre of water has a mass of almost exactly 1 kg.

Frequently asked questions

How many kilograms are in one microgram?

There are 1×10⁻⁹ kilograms in one microgram, and this value is exact by definition.

How do I convert micrograms to kilograms?

Multiply the number of micrograms by 1×10⁻⁹. For example, 10 µg × 1×10⁻⁹ = 1×10⁻⁸ kg.

How many micrograms are in one kilogram?

One kilogram equals 1,000,000,000 micrograms. That is the reverse factor, 1 ÷ 1×10⁻⁹.

What is 10 micrograms in kilograms?

10 µg = 1×10⁻⁸ kg.

Is this µg to kg 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.