Gram to Milligram
Convert Gram to Milligram instantly. Free online scientific unit converter with exact formula, conversion table and FAQ.
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Formula
milligram = gram × 1000
gram = milligram × 0.001
Conversion table
| 1 g | 1000 mg |
| 5 g | 5000 mg |
| 10 g | 10000 mg |
| 20 g | 20000 mg |
| 50 g | 50000 mg |
| 100 g | 100000 mg |
| 500 g | 500000 mg |
| 1000 g | 1e+06 mg |
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Frequently asked questions
What is the source unit in this conversion?
The source unit is the gram (g). A gram is one thousandth of a kilogram.
What is the destination unit in this conversion?
The destination unit is the milligram (mg). Milligram is 0.001 gram units.
How do I convert gram to milligram?
Multiply the gram value by 1000. For example, 10 g × 1000 = 10000 mg.
Is the gram to milligram conversion exact?
Yes. The relationship between these units is a fixed mathematical or SI-defined ratio, so the conversion factor is exact rather than a measured approximation.
Where is this conversion commonly used?
It's used whenever a value expressed in gram needs to be compared with, or reported in, milligram, such as in engineering, scientific, or laboratory calculations.
Can I convert milligram back to gram?
Yes. Multiply the milligram value by 0.001 to get gram.
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About this conversion
This page converts gram (g) to milligram (mg) within the scientific units converter.
A gram is one thousandth of a kilogram.
Milligram is 0.001 gram units.
The formula is milligram = gram × 1000, based on each unit's fixed relationship to the scientific converter's reference units.
The conversion is exact, since it relies on a fixed numerical ratio between the two units rather than a measured or approximate value.
Use the calculator above for instant results, or the table below for common gram values already converted to milligram.