Gram to Milligram Converter (g to mg)

How to Convert Gram to Milligram

Formula: Milligram = Gram × 1000

Example: 1 g = 1000 mg

You can also use the interactive converter above. Simply enter any Gram value and the equivalent Milligram value will appear instantly. Click the ⇄ button to reverse the conversion.

Here is a closer look at what Gram and Milligram are used for, plus answers to the questions people ask most about this conversion.

Step-by-step example — Convert 500 g to mg:

What is Gram and Milligram?

A Gram (g) is a metric unit of mass equal to one-thousandth of a kilogram. It is the go-to unit for small, everyday quantities.

A Milligram (mg) is one-thousandth of a gram, a very small unit reserved for precise, low-mass measurements.

Real World Uses of Gram to Milligram Conversion

• Gram: Commonly used for weighing cooking ingredients like flour, sugar and spices in recipes.
• Milligram: Commonly used for recording sample mass in chemistry and laboratory work.
• Gram: Commonly used on nutrition labels to show protein, sugar and fat content per serving.
• Milligram: Commonly used to state vitamin and mineral amounts on supplement and medicine labels.

Frequently Asked Questions

What is the formula to convert Gram to Milligram?

The formula is: Milligram = Gram x 1000. Multiply any Gram value by 1000 to get the equivalent in Milligram.

What is 1 Gram in Milligram?

1 g = 1000 mg.

How many Gram are in 1 Milligram?

1 mg = 0.001 g.

Is Gram bigger or smaller than Milligram?

Gram is bigger than Milligram. 1 Gram = 1000 mg.

What is 50 g in mg?

50 g = 50,000 mg.

What is 250 mg in g?

250 mg = 0.25 g.

Why do recipes outside the US measure ingredients in grams?

Grams give precise, consistent measurements for baking and cooking, which is why most recipes outside the US list ingredient weights in grams rather than cups or spoons.