This converter turns micrograms into kilograms instantly, using the exact factor 1 microgram = 1e-09 kilograms. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
One millionth of a gram, used for vitamins, hormones and trace analysis. The SI base unit of mass, redefined in 2019 in terms of the Planck constant.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
micrograms- The amount you are converting, measured in micrograms
1e-09- The exact number of kilograms in one microgram
kilograms- The converted result
How it works, step by step
- Enter the number of micrograms you want to convert.
- The value is multiplied by 1e-09, the exact conversion factor.
- The result is displayed in kilograms, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 micrograms
Multiply 5 by 1e-09. That gives 5.0000e-09 kilograms. A quick sanity check: one microgram is smaller than one kilogram, so the number should get smaller — and it does.
Converting 72 micrograms
72 × 1e-09 = 7.2000e-08 kilograms. Working backwards, 7.2000e-08 ÷ 1e-09 returns 72 micrograms, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many kilograms are in one microgram?
Exactly 1e-09. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert micrograms to kilograms?
Kilograms = micrograms × 1e-09. To reverse it, divide instead: micrograms = kilograms ÷ 1e-09, which is the same as multiplying by 1000000000.
Is the microgram bigger than the kilogram?
No. One microgram is only 1e-09 of a kilogram, so the kilogram is the larger unit.
Why does my answer differ slightly from other micrograms to kg converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a microgram?
One millionth of a gram, used for vitamins, hormones and trace analysis.
What is a kilogram?
The SI base unit of mass, redefined in 2019 in terms of the Planck constant.
Micrograms to kilograms reference table
| Micrograms | Kilograms |
|---|---|
| 0.5 µg | 5.0000e-10 kg |
| 1 µg | 1.0000e-09 kg |
| 2 µg | 2.0000e-09 kg |
| 3 µg | 3.0000e-09 kg |
| 5 µg | 5.0000e-09 kg |
| 10 µg | 1.0000e-08 kg |
| 15 µg | 1.5000e-08 kg |
| 20 µg | 2.0000e-08 kg |
| 25 µg | 2.5000e-08 kg |
| 50 µg | 5.0000e-08 kg |
| 75 µg | 7.5000e-08 kg |
| 100 µg | 1.0000e-07 kg |
| 250 µg | 2.5000e-07 kg |
| 500 µg | 5.0000e-07 kg |
| 1000 µg | 0.000001 kg |
Exact factor: 1 microgram = 1e-09 kilograms. Values rounded for display.