Grams to Micrograms
Convert grams to micrograms instantly. 1 g = 1,000,000 µg. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert grams to micrograms
To convert grams to micrograms, multiply by 1,000,000. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
µg = g × 1,000,000
Grams to Micrograms conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Grams | Micrograms |
|---|---|
| 1 g | 1,000,000 µg |
| 2 g | 2,000,000 µg |
| 3 g | 3,000,000 µg |
| 5 g | 5,000,000 µg |
| 10 g | 10,000,000 µg |
| 20 g | 20,000,000 µg |
| 25 g | 25,000,000 µg |
| 50 g | 50,000,000 µg |
| 100 g | 100,000,000 µg |
| 500 g | 500,000,000 µg |
| 1,000 g | 1,000,000,000 µg |
What is a gram?
A thousandth of a kilogram, and the practical unit for cooking by weight.
What is a microgram?
A millionth of a gram. The unit for vitamin doses and trace contaminants.
The formula
µg = g × 1,000,000
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Grams to Micrograms
- Type the number of grams you want to convert.
- Read the result in micrograms straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked micrograms to grams page.
Grams to Micrograms — frequently asked questions
How many micrograms are in a gram?
One gram equals 1,000,000 µg. µg = g × 1,000,000
What is the formula to convert grams to micrograms?
The formula is µg = g × 1,000,000. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert micrograms back to grams?
Divide instead of multiplying: one microgram is 1e-06 g. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this grams to micrograms free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 15, 2026 · Calculation runs client-side · No data collected · Report an error