Gram to Milligram Converter (g to mg)
1 gram = 1,000 milligram. A gram is exactly 1,000 milligrams.
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Result
0.25 g = 250 mg
How to convert gram to milligram
A gram is exactly 1,000 milligrams. Milligrams measure medicine doses, vitamins and trace ingredients, and grams are the next unit up on kitchen and lab scales.
Formula
mg = g × 1,000
Worked example
0.25 g × 1,000 = 250 mg
Gram to Milligram quick-reference table
| Gram (g) | Milligram (mg) |
|---|---|
| 0.001 g | 1 mg |
| 0.01 g | 10 mg |
| 0.1 g | 100 mg |
| 0.5 g | 500 mg |
| 1 g | 1,000 mg |
| 5 g | 5,000 mg |
Real-life examples
0.25 g of saffron is 250 mg, and 1.5 g of salt is 1,500 mg.
Frequently asked questions
How many mg are in a gram?
There are exactly 1,000 milligrams in 1 gram.
Is 1000 mg the same as 1 g?
Yes. 1,000 mg equals 1 g exactly.
What is 1 gram in milligram?
1 gram = 1,000 milligram (g to mg).
What is the formula to convert g to mg?
mg = g × 1,000. For example, 0.25 g × 1,000 = 250 mg.
How do I convert mg back to g?
Use the reverse converter: 1 milligram = 0.001 gram. Check: 250 mg converts back to 0.25 g.
Reverse conversion
Need the other direction? Milligram to Gram converter (mg to g): 1 milligram = 0.001 gram.
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