Milligrams to Grams converter (mg to g)
Convert Milligrams (mg) to Grams (g) with this free calculator. Type a value, press Convert, and the page applies the same factor shown in the formula below — no rounded shortcut, and nothing is stored on a server.
How to convert Milligrams to Grams
1 milligram (mg) is equal to 0.001 grams (g).
1 mg = 0.001 g
The mass m in grams (g) is equal to the mass m in milligrams (mg) divided by 1000:
Example: Convert 500 mg to grams:
m(g) = 500 mg ÷ 1000 = 0.5 g
What is a Milligrams?
The milligram (mg) is one-thousandth of a gram. Medicine doses and trace lab measurements are typically written in milligrams.
What is a Grams?
The gram (g) is one-thousandth of a kilogram. Nutrition labels, lab samples, and jewelry masses are commonly listed in grams.
This page converts mass from Milligrams into Grams. One mg equals 0.001 g.
Milligrams to Grams conversion table
Common mg values and the matching g result, calculated with the same factor as the widget. Highlight a nearby row if you want a quick check without entering a number.
| Milligrams (mg) | Grams (g) |
|---|---|
| 0 mg | 0 g |
| 1 mg | 0.001 g |
| 10 mg | 0.01 g |
| 50 mg | 0.05 g |
| 100 mg | 0.1 g |
| 200 mg | 0.2 g |
| 300 mg | 0.3 g |
| 400 mg | 0.4 g |
| 500 mg | 0.5 g |
| 600 mg | 0.6 g |
| 700 mg | 0.7 g |
| 800 mg | 0.8 g |
| 900 mg | 0.9 g |
| 1000 mg | 1 g |
| 2000 mg | 2 g |
| 5000 mg | 5 g |
| 10000 mg | 10 g |
How this calculator works
The form on this page is a Milligrams-to-Grams converter. After you enter a number, JavaScript multiplies or rearranges it with the published conversion factor and writes the g result in the output box. The step-by-step panel repeats the arithmetic so you can copy it into homework or a spreadsheet.
Reviewed by Hamsen, founder of GigaTables and a biology engineer. See the about page for how formulas are checked before a tool is published.
FAQ
How many g are in 1 mg?
1 mg = 0.001 g.
How do I convert Milligrams to Grams?
The mass m in grams (g) is equal to the mass m in milligrams (mg) divided by 1000:
Is this mg to g converter free?
Yes. GigaTables calculators are free to use in a browser. You do not need an account, and the values you type are not uploaded.