5 grams is equal to 5000 milligrams.
This conversion is done by multiplying the grams value by 1000, because there are 1000 milligrams in one gram. So, when converting from grams to milligrams, you just times the number by 1000.
Conversion Tool
Result in milligrams:
Conversion Formula
The formula to convert grams to milligrams is simple: multiply the number of grams by 1000. Since 1 gram equals 1000 milligrams, the formula looks like this:
milligrams = grams × 1000
This works because the prefix “milli-” means one thousandth, so a milligram is one thousandth of a gram. Therefore, to find how many milligrams are in grams, you scale the grams value up by a thousand.
Example:
- Convert 5 grams to milligrams:
- milligrams = 5 × 1000
- milligrams = 5000 mg
Conversion Example
- Example 1: Convert 2.3 grams to milligrams
- Multiply 2.3 by 1000
- 2.3 × 1000 = 2300
- Result: 2300 milligrams
- Example 2: Convert 0.75 grams to milligrams
- Multiply 0.75 by 1000
- 0.75 × 1000 = 750
- Result: 750 milligrams
- Example 3: Convert 10 grams to milligrams
- Multiply 10 by 1000
- 10 × 1000 = 10000
- Result: 10000 milligrams
- Example 4: Convert 15.6 grams to milligrams
- Multiply 15.6 by 1000
- 15.6 × 1000 = 15600
- Result: 15600 milligrams
- Example 5: Convert 0.02 grams to milligrams
- Multiply 0.02 by 1000
- 0.02 × 1000 = 20
- Result: 20 milligrams
Conversion Chart
The table below shows grams values from -20.0 to 30.0 and their equivalent in milligrams. You can read across each row to see how many milligrams correspond to each gram value. To find the milligrams for any given grams, multiply the grams by 1000.
| Grams (g) | Milligrams (mg) |
|---|---|
| -20.0 | -20000 |
| -15.0 | -15000 |
| -10.0 | -10000 |
| -5.0 | -5000 |
| 0.0 | 0 |
| 5.0 | 5000 |
| 10.0 | 10000 |
| 15.0 | 15000 |
| 20.0 | 20000 |
| 25.0 | 25000 |
| 30.0 | 30000 |
Related Conversion Questions
- How many milligrams are in 5 grams exactly?
- What is 5 grams converted into milligrams?
- If I have 5 grams, how do I write that in milligrams?
- Is 5 grams equal to 5000 milligrams or something else?
- Can I convert 5 grams to milligrams using a simple formula?
- What’s the quickest way to change 5 grams into milligrams?
- How much milligrams does 5 grams represent in weight?
Conversion Definitions
Grams: Grams is a metric unit of mass, equal to one-thousandth of a kilogram. It’s commonly used to measure small quantities of substances, especially in cooking, science, and medicine. One gram equals 1000 milligrams, making it larger than a milligram but smaller than a kilogram.
Milligrams: Milligrams are a unit of mass in the metric system equal to one-thousandth of a gram. This unit is useful when measuring very small quantities, such as medicine dosages or chemical substances. One milligram is much smaller than a gram, allowing precise measurement of tiny amounts.
Conversion FAQs
Can I convert from grams to milligrams without a calculator?
Yes, converting grams to milligrams can be done mentally by multiplying the grams value by 1000. Since the factor is a whole number, it’s easy to calculate by moving the decimal point three places to the right.
Are milligrams always smaller than grams?
By definition, yes. A milligram is one-thousandth of a gram, so milligrams represent much smaller amounts of mass. Therefore, any number in milligrams will be larger numerically if converted from grams.
Does this conversion work for all substances?
The conversion from grams to milligrams applies only to mass measurements. It doesn’t depend on the type of substance. So whether you measure sugar, water, or powders, the conversion factor remains the same.
Why do negative values appear in the conversion chart?
Negative values represent hypothetical or theoretical mass values below zero, which are not physically meaningful but used here to show mathematical consistency. In practical terms, mass can’t be negative, but the conversion formula still applies to any numeric input.
How precise is the milligram value when converted from grams?
The precision depends on the decimal places in the original grams value. Since 1 gram equals 1000 milligrams, converting keeps the same relative precision but scales the number up by 1000. Rounded results might lose some decimal accuracy if truncated.
Last Updated : 22 July, 2025
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Sandeep Bhandari holds a Bachelor of Engineering in Computers from Thapar University (2006). He has 20 years of experience in the technology field. He has a keen interest in various technical fields, including database systems, computer networks, and programming. You can read more about him on his bio page.