Grams to Milligrams Converter
Convert grams (g) to milligrams (mg)
Result
1,000 mg
Milligrams
1 g = 1,000 mg
1 g in other units
- 1Enter a valueType the number to convert
- 2Pick the unitsChoose what to convert from and to
- 3Read the resultSee it in every other unit too
How to convert grams to milligrams
One gram equals 1,000 milligrams, so multiply the number of grams by 1,000.
mg = g × 1,000
1 g = 1,000 mg · 1 mg = 0.001 g
Worked example
To convert 5 grams to milligrams: 5 g × 1,000 = 5,000 mg.
About grams (g)
A gram is one thousandth of a kilogram. Food, gold and small items are weighed in grams.
About milligrams (mg)
A milligram is one thousandth of a gram. Medicine doses and nutrition labels often use milligrams.
More conversions
Grams to other units
Other units to Milligrams
Frequently asked questions
How many milligrams are in one gram?
One gram equals 1,000 milligrams.
How many grams are in one milligram?
One milligram equals 0.001 grams.
How do I convert grams to milligrams?
Use the formula mg = g × 1,000. For example, 5 g × 1,000 = 5,000 mg.