Milligram to Gram Converter
One Milligram equals 0.001 Gram (1 mg = 0.001 g). Multiply a Milligram value by 0.001 to get the equivalent in Gram. Use the calculator above for instant results, or follow the formula, worked examples, and reference table below.
Formula
g = mg × 0.001
Multiply the Milligram value by 0.001 to get the equivalent value in Gram.
Example Conversions
1 Milligram (mg)
0.001 Gram (g)
5 Milligram (mg)
0.005 Gram (g)
10 Milligram (mg)
0.01 Gram (g)
25 Milligram (mg)
0.025 Gram (g)
100 Milligram (mg)
0.1 Gram (g)
Conversion Table
| Milligram (mg) | Gram (g) |
|---|---|
| 0.1 | 0.0001 |
| 0.5 | 0.0005 |
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1000 | 1 |
How to Convert Manually
Use these steps to convert Milligram values to Gram without the calculator.
- Write down the value in Milligram (mg) that you want to convert.
- Multiply that value by 0.001.
- For example, 10 Milligram × 0.001 = 0.01 Gram.
- Label the result as Gram (g).
Relative Size Comparison
This chart shows the visual difference in size between exactly one Milligram and one Gram.
About Milligram and Gram
The milligram is one thousandth of a gram, or a millionth of a kilogram. Medication dosages and trace nutrient amounts are stated in milligrams. The gram is one thousandth of a kilogram. Recipes, nutrition labels, and postal scales work in grams because the kilogram is too coarse for them. One Milligram equals 0.001 Gram (1 mg = 0.001 g). Milligram to Gram conversion comes up most often in medication dosages and in vitamin and supplement labels, typically when figures need restating for cooking and baking recipes.
Precision and Rounding: Metric-imperial mass factors are exact (1 lb = 0.45359237 kg by the 1959 agreement), so precision is purely a display choice. One decimal place is enough for body weight and cooking; nutrition labeling, pharmacy, and lab work need the full factor before rounding.
Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).
Worked Example
15 Milligram equals 0.015 Gram.
15 mg × 0.001 = 0.015 g
FAQ
How do I convert Milligram to Gram?
Multiply the Milligram value by 0.001 to get the equivalent value in Gram.
What is the formula for Milligram to Gram?
The formula is g = mg × 0.001.
How many Gram are in 1 Milligram?
1 Milligram equals 0.001 Gram.
Can I convert Gram back to Milligram?
Yes. 1 Gram equals 1000 Milligram, and the related converter can reverse the calculation.
What are common names for Milligram and Gram?
Milligram is shown as mg and may also be searched as milligrams, milligramme, milligrammes. Gram is shown as g and may also be searched as grams, gramme, grammes.
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