This converter turns micrograms into carats instantly, using the exact factor 1 microgram = 5e-06 carats. 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. Exactly 200 milligrams — the mass unit for gemstones and pearls.
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
5e-06- The exact number of carats in one microgram
carats- The converted result
How it works, step by step
- Enter the number of micrograms you want to convert.
- The value is multiplied by 5e-06, the exact conversion factor.
- The result is displayed in carats, 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 5e-06. That gives 0.000025 carats. A quick sanity check: one microgram is smaller than one carat, so the number should get smaller — and it does.
Converting 72 micrograms
72 × 5e-06 = 0.00036 carats. Working backwards, 0.00036 ÷ 5e-06 returns 72 micrograms, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many carats are in one microgram?
Exactly 5e-06. 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 carats?
Carats = micrograms × 5e-06. To reverse it, divide instead: micrograms = carats ÷ 5e-06, which is the same as multiplying by 200000.
Is the microgram bigger than the carat?
No. One microgram is only 5e-06 of a carat, so the carat is the larger unit.
Why does my answer differ slightly from other micrograms to carats 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 carat?
Exactly 200 milligrams — the mass unit for gemstones and pearls.
Micrograms to carats reference table
| Micrograms | Carats |
|---|---|
| 0.5 µg | 0.000003 ct |
| 1 µg | 0.000005 ct |
| 2 µg | 0.00001 ct |
| 3 µg | 0.000015 ct |
| 5 µg | 0.000025 ct |
| 10 µg | 0.00005 ct |
| 15 µg | 0.000075 ct |
| 20 µg | 0.0001 ct |
| 25 µg | 0.000125 ct |
| 50 µg | 0.00025 ct |
| 75 µg | 0.000375 ct |
| 100 µg | 0.0005 ct |
| 250 µg | 0.00125 ct |
| 500 µg | 0.0025 ct |
| 1000 µg | 0.005 ct |
Exact factor: 1 microgram = 5e-06 carats. Values rounded for display.