Convert milligrams to grams

1 mg=0.001g

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

You have

Equals

0.001

Conversion formula

Forward

grams = milligrams × 0.001

Reverse

milligrams = grams × 1,000

Example: 10 mg × 0.001 = 0.01 g.

About both units

From

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

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 to Gram conversion table

Common milligrams to grams values for quick reference.

Milligram (mg)	Gram (g)
1 mg	0.001 g
5 mg	0.005 g
10 mg	0.01 g
25 mg	0.025 g
50 mg	0.05 g
100 mg	0.1 g
250 mg	0.25 g
500 mg	0.5 g
1,000 mg	1 g
5,000 mg	5 g

Tips & common mistakes

Quick tips

1 mg = 1/1000 g = 1,000,000 µg. Always check which prefix the label uses.
Read medication labels carefully — confusing mg and µg can be a 1000× dosing error.
Nutrition labels list minerals in mg and vitamins (A, D, K) in µg.

Avoid these

Reading 500 mg as 500 g on a medicine bottle — a potentially fatal 1000× error.
Confusing mg (milligram) with mg/kg (dose per kilogram of body weight).
Mixing up mg and µg — µg is 1000× smaller.

Frequently asked questions

How many grams in a milligram?

One milligram equals 0.001 grams.

How do I convert milligrams to grams?

Multiply the milligram value by 0.001 to get the equivalent in grams.

What is 100 milligrams in grams?

100 milligrams equals 0.1 grams.

Is a milligram bigger than a gram?

No. 1 milligram equals 0.001 grams, so one milligram is smaller.

How to convert milligrams to grams without a calculator?

Multiply by 0 for a quick estimate; use a calculator for precise results.

Related weight conversions

📊 See full comparison matrix →

Conversions in other categories

LengthKilometer → Mile TemperatureCelsius → Fahrenheit VolumeLiter → US Gallon AreaSquare Meter → Square Foot SpeedKilometer per Hour → Mile per Hour EnergyKilojoule → Kilocalorie PressureBar → Pound per Square Inch PowerKilowatt → Mechanical Horsepower