Grams to Milligrams (g to mg) Converter
1 gram (g) = 1,000 milligrams (mg). To convert grams to milligrams, multiply by 1,000: 250 g × 1,000 = 250,000 mg.
Quick facts
- 1 g = 1,000 mg
- 1 mg = 0.001 g
- Formula: mg = g × 1,000
- Quick estimate: multiply by about 1000
How to convert grams to milligrams
- Take the value in grams.
- Multiply it by 1,000 (the number of milligrams in one gram).
- Round the result to the precision you need.
Worked example (a pack of butter): 250 g × 1,000 = 250000 mg.
To convert milligrams back to grams, multiply by 0.001, or divide by 1,000.
Source: NIST Special Publication 811 (2008), Appendix B (1 pound = 0.45359237 kg exactly). Tola, seer and maund use the standard values given in their definitions on this page.
Grams to Milligrams conversion table
| Grams [g] | Milligrams [mg] |
|---|---|
| 0.001 g | 1 mg |
| 0.01 g | 10 mg |
| 0.1 g | 100 mg |
| 0.5 g | 500 mg |
| 1 g | 1000 mg |
| 2 g | 2000 mg |
| 5 g | 5000 mg |
| 10 g | 10000 mg |
g to mg chart from 1 to 100
- 1 g 1000 mg
- 2 g 2000 mg
- 3 g 3000 mg
- 4 g 4000 mg
- 5 g 5000 mg
- 6 g 6000 mg
- 7 g 7000 mg
- 8 g 8000 mg
- 9 g 9000 mg
- 10 g 10000 mg
- 11 g 11000 mg
- 12 g 12000 mg
- 13 g 13000 mg
- 14 g 14000 mg
- 15 g 15000 mg
- 16 g 16000 mg
- 17 g 17000 mg
- 18 g 18000 mg
- 19 g 19000 mg
- 20 g 20000 mg
- 25 g 25000 mg
- 30 g 30000 mg
- 35 g 35000 mg
- 40 g 40000 mg
- 45 g 45000 mg
- 50 g 50000 mg
- 55 g 55000 mg
- 60 g 60000 mg
- 65 g 65000 mg
- 70 g 70000 mg
- 75 g 75000 mg
- 80 g 80000 mg
- 85 g 85000 mg
- 90 g 90000 mg
- 95 g 95000 mg
- 100 g 100000 mg
Milligrams to Grams conversion table
| Milligrams [mg] | Grams [g] |
|---|---|
| 0.01 mg | 0.00001 g |
| 0.1 mg | 0.0001 g |
| 1 mg | 0.001 g |
| 2 mg | 0.002 g |
| 3 mg | 0.003 g |
| 5 mg | 0.005 g |
| 10 mg | 0.01 g |
| 20 mg | 0.02 g |
| 50 mg | 0.05 g |
| 100 mg | 0.1 g |
| 1000 mg | 1 g |
Grams vs Milligrams
| Gram | Milligram | |
|---|---|---|
| Symbol | g | mg |
| Equals | 1 g = 1,000 mg | 1 mg = 0.001 g |
What is a gram?
One thousandth of a kilogram, the SI base unit of mass. Used for food packaging, cooking, and small everyday items.
What is a milligram?
One thousandth of a gram. Used for medication dosages and precise lab measurements.
Frequently asked questions
How many milligrams are in a gram?
There are 1,000 milligrams in 1 gram (1 g = 1000 mg).
How many grams are in a milligram?
There are 0.001 grams in 1 milligram (1 mg = 0.001 g).
How do I convert grams to milligrams?
Multiply the number of grams by 1,000. For example, 10 g × 1,000 = 10,000 mg. To convert back, multiply by 0.001.
What is 10 g in milligrams?
10 g = 10,000 mg.
What is 100 g in milligrams?
100 g = 100,000 mg.
Is the conversion exact?
Yes. The factor comes from the official definitions of both units (NIST Special Publication 811 (2008), Appendix B (1 pound = 0.45359237 kg exactly). Tola, seer and maund use the standard values given in their definitions on this page). Results are shown to up to 10 decimal places; round them to suit your purpose.
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