Convert gram to milligram
1 g = 1,000 mg
1 g = 1,000 mg
1 g in every mass unit
| microgram | 1,000,000 μg |
| milligram | 1,000 mg |
| gram | 1 g |
| kilogram | 0.001 kg |
| metric tonne | 0.000001 t |
| ounce | 0.0353 oz |
| pound | 0.0022 lb |
| stone | 0.000157 st |
| US short ton | 0.0000011 ton |
| grain | 15.4 gr |
| unified atomic mass unit (dalton) | 6.02e+23 u |
How the conversion works
Multiply by 1,000 to go from gram to milligram, or divide by it to go back. Every conversion on this site routes through the SI value (kg) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.
Going the other way? milligram to gram — 1 mg = 0.001 g.
gram to milligram — common values
| 1 g | 1,000 mg |
| 2 g | 2,000 mg |
| 3 g | 3,000 mg |
| 5 g | 5,000 mg |
| 10 g | 10,000 mg |
| 15 g | 15,000 mg |
| 20 g | 20,000 mg |
| 25 g | 25,000 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 |
| 1000 g | 1,000,000 mg |