Convert grams to milligrams

1 g=1,000mg

Use the converter below to change any grams value into milligrams instantly — with formula, conversion table, and real-world examples.

You have

Equals

1,000

Conversion formula

Forward

milligrams = grams × 1,000

Reverse

grams = milligrams × 0.001

Example: 10 g × 1,000 = 10,000 mg.

About both units

From

Gram

The gram equals one thousandth of a kilogram. It is the standard unit in European cooking, pharmaceuticals and jewellery. An A4 sheet of 80 g/m² paper weighs about 5 g; a regular chicken egg is around 60 g. The word "gram" comes from the Greek "gramma", a small weight.

Real-world: A chicken egg weighs about 60 g. A standard bar of chocolate is 100 g. A euro coin weighs 7.5 g.

Read full gram reference →

Milligram

The milligram equals one thousandth of a gram. It is the dosing unit for most oral medications. A standard paracetamol tablet contains 500 mg. The daily recommended intake of iron for adult men is 8 mg, for women 18 mg. Micrograms (µg) are used for even smaller quantities like vitamin D.

Real-world: A paracetamol tablet is 500 mg. Daily iron intake: 8 mg (men) / 18 mg (women). Aspirin for heart protection: 75–100 mg daily.

Read full milligram reference →

Gram to Milligram conversion table

Common grams to milligrams values for quick reference.

Gram (g)	Milligram (mg)
1 g	1,000 mg
5 g	5,000 mg
10 g	10,000 mg
25 g	25,000 mg
50 g	50,000 mg
100 g	100,000 mg
250 g	250,000 mg
500 g	500,000 mg
1,000 g	1,000,000 mg
5,000 g	5,000,000 mg

Tips & common mistakes

Quick tips

1 kitchen tablespoon of water weighs about 15 g, but 1 tablespoon of flour is only 8 g — density varies.
A kitchen scale reads to 1 g; a jewellery scale to 0.01 g.
Gold is priced by gram in Europe and per troy ounce in international markets.

Avoid these

Assuming a tablespoon of any ingredient equals 15 g — true only for water.
Confusing g (gram) with mg (milligram) on medication labels.
Using 28 g instead of 28.35 g when converting an ounce in precision baking.

Frequently asked questions

How many milligrams in a gram?

One gram equals 1,000 milligrams.

How do I convert grams to milligrams?

Multiply the gram value by 1,000 to get the equivalent in milligrams.

What is 100 grams in milligrams?

100 grams equals 100,000 milligrams.

Is a gram bigger than a milligram?

Yes. 1 gram equals 1,000 milligrams, so one gram is larger.

How to convert grams to milligrams without a calculator?

Multiply by 1,000 for a quick estimate; use a calculator for precise results.

Related weight conversions

📊 See full comparison matrix →

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