Convert milligrams to grams
g = mg × 0.001. 200 mg = 0.2 g.
g = mg × 0.001 — 1 mg is 0.001 g
Common values, converted exactly
| milligrams (mg) | grams (g) |
|---|---|
| 1 mg | 0.001 g |
| 5 mg | 0.005 g |
| 10 mg | 0.01 g |
| 25 mg | 0.025 g |
| 50 mg | 0.05 g |
| 100 mg | 0.1 g |
| 200 mg | 0.2 g |
| 250 mg | 0.25 g |
| 325 mg | 0.325 g |
| 500 mg | 0.5 g |
| 1000 mg | 1 g |
| 2000 mg | 2 g |
| 5000 mg | 5 g |
Related conversions
To convert milligrams to grams, apply g = mg × 0.001. For example, 200 mg = 0.2 g, and 1 mg is 0.001 g.
A milligram is exactly one thousandth of a gram: both are metric, so this is a shift of the decimal point, not a measured factor. Doses and supplements are labelled in milligrams. A microgram (mcg or µg) is a thousand times smaller again, and mixing the two up is a thousandfold error.
Everything on this page is computed in your browser from the exact definitions above — the table is not a stored list of pre-rounded answers, and neither is the converter. For a unit not covered here, the full unit converter handles length, weight, volume, temperature and cooking measures.
How many grams is 200 mg?
200 mg = 0.2 g. g = mg × 0.001, so any amount converts the same way — the table on this page lists the values most often looked up.
What is the formula for converting milligrams to grams?
g = mg × 0.001. A milligram is exactly one thousandth of a gram: both are metric, so this is a shift of the decimal point, not a measured factor. Doses and supplements are labelled in milligrams. A microgram (mcg or µg) is a thousand times smaller again, and mixing the two up is a thousandfold error.
Is the milligrams to grams conversion exact?
The underlying relationship is an exact definition, not a measurement. The decimal factor shown (0.001 g) is a rounding of it, so results here are given to six significant figures — enough for any practical use, and you can see the exact definition above.
How do I convert grams back to milligrams?
Use the reverse of the same relationship; the g to mg page has its own table and converter.