Converting grams to milligrams provides extremely precise measurements essential for medical dosing, pharmaceutical applications, and scientific research. This conversion allows for accurate measurement of very small quantities.

Conversion Formula

To convert grams to milligrams, multiply the gram value by 1000:

milligrams = grams × 1000

Common Conversions

Grams	Milligrams
1 g	1000 mg
0.5 g	500 mg
0.25 g	250 mg
0.1 g	100 mg
2 g	2000 mg
5 g	5000 mg
10 g	10000 mg
25 g	25000 mg

Practical Examples

Medication: 0.5 g aspirin equals 500 mg
Vitamin: 1 g vitamin C equals 1000 mg
Supplement: 2 g protein powder equals 2000 mg
Chemical: 0.1 g sample equals 100 mg

When to Use This Conversion

Medical prescriptions and dosing
Pharmaceutical manufacturing
Scientific research and laboratory work
Nutritional supplements and vitamins
Chemical analysis and testing
Quality control in manufacturing

Accuracy and Precision

The conversion factor of 1000 milligrams per gram is exact within the metric system. This precise relationship is critical for medical and scientific applications where accuracy can be a matter of safety and efficacy.

Frequently Asked Questions

How many milligrams are in a gram?

There are exactly 1000 milligrams in one gram.

How do you convert 0.75 g to mg?

Multiply 0.75 by 1000: 0.75 × 1000 = 750 mg.

Which is smaller, grams or milligrams?

Milligrams are smaller. It takes 1000 milligrams to equal one gram.

Why use milligrams in medicine?

Milligrams provide the precision needed for safe and effective medication dosing, especially for potent drugs where small differences matter.