Convert milligrams to grams
1 mg = 0.001 g — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
0.001g
As a fraction: 1/1000
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1 mg = 0.001 g
Show this value in all 34 weight & mass units
- Megagrams Mg 1e-9
- Kilograms kg 0.000 001
- Hectograms hg 0.000 01
- Decagrams dag 0.0001
- Grams g 0.001
- Decigrams dg 0.01
- Centigrams cg 0.1
- Milligrams mg 1
- Micrograms µg 1000
- Nanograms ng 1 000 000
- Picograms pg 1 000 000 000
- Tonnes t 1e-9
- Kilotonnes kt 1e-12
- Megatonnes Mt 1e-15
- Quintals q 1e-8
- Carats ct 0.005
- Pounds lb 0.000 002 204 622 621 85
- Ounces oz 0.000 035 273 961 949 6
- Drams dr 0.000 564 383 391 193
- Grains gr 0.015 432 358 352 9
- Stones st 0.000 000 157 473 044 418
- Hundredweight (US)s cwt (US) 2.20462262185e-8
- Hundredweight (UK)s cwt (UK) 1.96841305522e-8
- Short ton (US)s tn 1.10231131092e-9
- Long ton (UK)s LT 9.84206527611e-10
- Troy ounces ozt 0.000 032 150 746 568 6
- Troy pounds lbt 0.000 002 679 228 880 72
- Pennyweights dwt 0.000 643 014 931 373
- Slugs slug 6.85217658568e-8
- Atomic mass units u 6.02214075367e+20
- Electron masss mₑ 1.09776910426e+24
- Planck masss mₚ 45.946 718 347 5
- Earth masss M🜨 1.67442483507e-31
- Solar masss M☉ 5.02785431289e-37
Every row is Milligram (mg) converted through the kilogram, in exact rational arithmetic.
How to convert milligrams to grams
Multiply the number of milligrams by 0.001 to get grams.
The exact factor is 0.001 — as a fraction, 1/1000.
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 |
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 |
Frequently asked
How many grams are in a milligram?
One milligram equals 0.001 grams (mg → g). That figure is exact, not rounded.
How do you convert milligrams to grams?
Multiply the number of milligrams by 0.001 to get grams.
What is 1 g in milligrams?
One gram is 1000 milligrams.
What is 10 mg in g?
10 mg = 0.01 g.