Convert Grams to Milligrams
g to mg · weight & mass conversion
What are grams and milligrams?
A gram is one-thousandth of a kilogram, about the mass of a small paperclip. A milligram is one-thousandth of a gram, used for medication doses and tiny quantities. For scale: a 70 kg adult weighs about 154 lb, and a bag of sugar is usually 1 kg (2.2 lb).
How to convert grams to milligrams
1 g = 1,000 mg. To convert, multiply the number of grams by 1,000. For example, 5 g = 5,000 mg, and 20 g = 20,000 mg. To go the other way, multiply milligrams by 0.001 (since 1 mg = 0.001 g).
Grams to Milligrams conversion table
| Grams (g) | Milligrams (mg) |
|---|---|
| 1 | 1,000 |
| 2 | 2,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 25 | 25,000 |
| 50 | 50,000 |
| 100 | 100,000 |
FAQ
What is 1 g in mg?
1 g = 1,000 mg. To convert any amount, multiply the number of grams by 1,000.
How do I convert milligrams back to grams?
Go the other way: 1 mg = 0.001 g, so multiply milligrams by 0.001 to get grams.
Is a gram bigger than a milligram?
Yes — 1 g is the larger unit, equal to 1,000 mg.
Are these weight & mass conversions exact?
They use the standard internationally-defined conversion factors. Results are rounded to six significant figures for readability, which is accurate enough for everyday and most technical use.