Weight converter
Milligrams to Grams
If you need to know how many Grams one Milligrams contains, the answer is 0.001. The conversion is linear, so 10 mg is 0.01 g and 100 mg is 0.1 g. Use the converter for any other value.
Formula 1 mg = 0.001 g
Need the other direction? Grams to Milligrams.
How to convert Milligrams to Grams
The milligram is one thousandth of a gram and is standard for dosages and trace measurements. The gram is one thousandth of a kilogram and is common in cooking and chemistry.
To convert Milligrams to Grams, multiply the value in mg by 0.001. For example, 10 mg × 0.001 = 0.01 g. This works because the ratio between the two units is constant for every value in weight.
Worked examples
| mg | g |
|---|---|
| 1 mg | 0.001 g |
| 2.5 mg | 0.0025 g |
| 5 mg | 0.005 g |
| 10 mg | 0.01 g |
| 25 mg | 0.025 g |
| 50 mg | 0.05 g |
| 100 mg | 0.1 g |
Reverse conversion
| g | mg |
|---|---|
| 1 g | 1,000 mg |
| 5 g | 5,000 mg |
| 10 g | 10,000 mg |
| 25 g | 25,000 mg |
| 50 g | 50,000 mg |
| 100 g | 100,000 mg |
When this conversion is useful
This is the calculation you need when you are comparing body weight, shipping weight or a recipe across metric and imperial units. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 mg is 1 g.
Is the conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.
mg to g conversion chart
The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.
| Milligrams (mg) | Grams (g) |
|---|---|
| 1 mg | 0.001 g |
| 2 mg | 0.002 g |
| 3 mg | 0.003 g |
| 4 mg | 0.004 g |
| 5 mg | 0.005 g |
| 6 mg | 0.006 g |
| 7 mg | 0.007 g |
| 8 mg | 0.008 g |
| 9 mg | 0.009 g |
| 10 mg | 0.01 g |
| 11 mg | 0.011 g |
| 12 mg | 0.012 g |
| 13 mg | 0.013 g |
| 14 mg | 0.014 g |
| 15 mg | 0.015 g |
| 16 mg | 0.016 g |
| 17 mg | 0.017 g |
| 18 mg | 0.018 g |
| 19 mg | 0.019 g |
| 20 mg | 0.02 g |
| 21 mg | 0.021 g |
| 22 mg | 0.022 g |
| 23 mg | 0.023 g |
| 24 mg | 0.024 g |
| 25 mg | 0.025 g |
| 26 mg | 0.026 g |
| 27 mg | 0.027 g |
| 28 mg | 0.028 g |
| 29 mg | 0.029 g |
| 30 mg | 0.03 g |
| 31 mg | 0.031 g |
| 32 mg | 0.032 g |
| 33 mg | 0.033 g |
| 34 mg | 0.034 g |
| 35 mg | 0.035 g |
| 36 mg | 0.036 g |
| 37 mg | 0.037 g |
| 38 mg | 0.038 g |
| 39 mg | 0.039 g |
| 40 mg | 0.04 g |
| 41 mg | 0.041 g |
| 42 mg | 0.042 g |
| 43 mg | 0.043 g |
| 44 mg | 0.044 g |
| 45 mg | 0.045 g |
| 46 mg | 0.046 g |
| 47 mg | 0.047 g |
| 48 mg | 0.048 g |
| 49 mg | 0.049 g |
| 50 mg | 0.05 g |
| 60 mg | 0.06 g |
| 70 mg | 0.07 g |
| 80 mg | 0.08 g |
| 90 mg | 0.09 g |
| 100 mg | 0.1 g |
Frequently asked questions
How many Grams are in 1 Milligrams?
1 mg equals 0.001 g.
How do I convert Milligrams to Grams?
Multiply the mg value by 0.001. Example: 25 mg = 0.025 g.
What is 2.5 mg in g?
2.5 mg = 0.0025 g.
Is the mg to g conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Does the calculator work offline?
Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.