1 gram equals exactly
1.000 milligrams
The gram (g) and milligram (mg) are both units of mass in the International System. The prefix 'milli' means one thousandth: a milligram is therefore one thousandth of a gram, and a gram contains exactly 1,000 milligrams.
To convert a measurement from grams to milligrams, simply multiply the value in grams by 1,000:
To convert from milligrams to grams, perform the inverse operation, dividing by 1,000:
The milligram is the standard unit for dosing medications and dietary supplements, where precision is essential for safety (for example, 500 mg of paracetamol per tablet). This conversion is essential in pharmaceutical and medical contexts, where calculation errors between grams and milligrams can have serious consequences.