Convert grams to milligrams
1 g = 1000 mg — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
1000mg
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1 g = 1000 mg
Show this value in all 34 weight & mass units
- Megagrams Mg 0.000 001
- Kilograms kg 0.001
- Hectograms hg 0.01
- Decagrams dag 0.1
- Grams g 1
- Decigrams dg 10
- Centigrams cg 100
- Milligrams mg 1000
- Micrograms µg 1 000 000
- Nanograms ng 1 000 000 000
- Picograms pg 1 000 000 000 000
- Tonnes t 0.000 001
- Kilotonnes kt 1e-9
- Megatonnes Mt 1e-12
- Quintals q 0.000 01
- Carats ct 5
- Pounds lb 0.002 204 622 621 85
- Ounces oz 0.035 273 961 949 6
- Drams dr 0.564 383 391 193
- Grains gr 15.432 358 352 9
- Stones st 0.000 157 473 044 418
- Hundredweight (US)s cwt (US) 0.000 022 046 226 218 5
- Hundredweight (UK)s cwt (UK) 0.000 019 684 130 552 2
- Short ton (US)s tn 0.000 001 102 311 310 92
- Long ton (UK)s LT 0.000 000 984 206 527 611
- Troy ounces ozt 0.032 150 746 568 6
- Troy pounds lbt 0.002 679 228 880 72
- Pennyweights dwt 0.643 014 931 373
- Slugs slug 0.000 068 521 765 856 8
- Atomic mass units u 6.02214075367e+23
- Electron masss mₑ 1.09776910426e+27
- Planck masss mₚ 45 946.718 347 5
- Earth masss M🜨 1.67442483507e-28
- Solar masss M☉ 5.02785431289e-34
Every row is Gram (g) converted through the kilogram, in exact rational arithmetic.
How to convert grams to milligrams
Multiply the number of grams by 1000 to get milligrams.
The exact factor is 1000 .
Gram to Milligram conversion table
| Grams (g) | Milligrams (mg) |
|---|---|
| 1 g | 1000 |
| 2 g | 2000 |
| 3 g | 3000 |
| 5 g | 5000 |
| 10 g | 10 000 |
| 20 g | 20 000 |
| 25 g | 25 000 |
| 50 g | 50 000 |
| 100 g | 100 000 |
| 250 g | 250 000 |
| 500 g | 500 000 |
| 1000 g | 1 000 000 |
Milligram to Gram conversion table
| Milligrams (mg) | Grams (g) |
|---|---|
| 1 mg | 0.001 |
| 2 mg | 0.002 |
| 3 mg | 0.003 |
| 5 mg | 0.005 |
| 10 mg | 0.01 |
| 20 mg | 0.02 |
| 25 mg | 0.025 |
| 50 mg | 0.05 |
| 100 mg | 0.1 |
| 250 mg | 0.25 |
| 500 mg | 0.5 |
| 1000 mg | 1 |
Frequently asked
How many milligrams are in a gram?
One gram equals 1000 milligrams (g → mg). That figure is exact, not rounded.
How do you convert grams to milligrams?
Multiply the number of grams by 1000 to get milligrams.
What is 1 mg in grams?
One milligram is 0.001 grams.
What is 10 g in mg?
10 g = 10 000 mg.