Grams to Milligrams (g to mg)
Free online gram to milligram converter. Type a value, get an instant exact result — plus the formula, a ready-made conversion table, and reverse conversion.
WEIGHT AND MASS CONVERTER — INSTANT RESULT
Formula: multiply the gram value by 1,000 — i.e. mg = g × 1,000
Quick check: 1 g = 1,000 mg
Quick check: 1 g = 1,000 mg
Grams to Milligrams conversion table
| Grams (g) | Milligrams (mg) |
|---|---|
| 1 g | 1,000 mg |
| 2 g | 2,000 mg |
| 3 g | 3,000 mg |
| 4 g | 4,000 mg |
| 5 g | 5,000 mg |
| 6 g | 6,000 mg |
| 7 g | 7,000 mg |
| 8 g | 8,000 mg |
| 9 g | 9,000 mg |
| 10 g | 10,000 mg |
| 15 g | 15,000 mg |
| 20 g | 20,000 mg |
| 25 g | 25,000 mg |
| 30 g | 30,000 mg |
| 40 g | 40,000 mg |
| 50 g | 50,000 mg |
| 75 g | 75,000 mg |
| 100 g | 100,000 mg |
| 250 g | 250,000 mg |
| 500 g | 500,000 mg |
| 1,000 g | 1,000,000 mg |
How to convert grams to milligrams
To convert grams to milligrams, multiply the amount in grams by 1,000. For example, 10 g = 10,000 mg. To convert in the other direction, divide by the same factor, or use the ⇄ swap button above.
Convert between metric, avoirdupois, troy and apothecary mass units. The kilogram is the SI base unit of mass; pounds and ounces below follow the international avoirdupois definitions (1 lb = 0.45359237 kg exactly).
Frequently asked questions
How many milligrams are in one gram?
One gram is exactly 1,000 milligrams.
How do I convert g to mg?
Multiply the g value by 1,000 to get mg. The converter at the top of this page does this automatically and works in both directions.
How much is 100 grams in milligrams?
100 grams equals 100,000 milligrams.