Weight Converter

Convert among kilograms, grams, milligrams, tonnes, pounds, ounces, and stones.

Mass
3
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Related Conversions
2 g to mg 10 g to mg 25 g to mg 30 g to mg 40 g to mg 50 g to mg 150 g to mg 200 g to mg 240 g to mg 250 g to mg 600 g to mg 1,200 g to mg
Reverse Conversions
1 mg to g 10 mg to g 12 mg to g 16 mg to g 20 mg to g 25 mg to g 50 mg to g 125 mg to g 250 mg to g 270 mg to g 360 mg to g 1,000 mg to g
More Weight Conversions
1 kg to lb 1 lb to kg 2 oz to g 5 kg to lb 5 lb to kg 10 lb to kg 10 oz to g 50 lb to kg 50 oz to g 70 kg to lb 100 lb to kg 200 lb to kg

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Common Benchmarks

Gallon of water 8.34 lb
Carry-on suitcase 22 lb
Bowling ball 16 lb
Bag of flour 5 lb
House cat 10 lb
Car tire 25 lb

Formula

mg = g × 1000

Example

Example: convert 300 grams to milligrams.

300 g = 300000 mg

Conversion table

grams (g) milligrams (mg)
1 g 1000 mg
2 g 2000 mg
5 g 5000 mg
10 g 10000 mg
20 g 20000 mg
50 g 50000 mg
100 g 100000 mg

Explanation

Grams are used for small masses, food portions, and lab measurements.

How to convert grams to milligrams

  1. Start with the value in grams (g).
  2. Multiply it by 1000.
  3. The result is the measurement in milligrams (mg).

Example: 300 g → 300000 mg

Frequently Asked Questions

How much is 300 grams in milligrams?

300 grams is about 300000 milligrams.

How many milligrams is 1 gram?

1 gram equals 1000 milligrams.

How many grams is 1 milligram?

1 milligram equals 0.001 grams.

What is the difference between grams and milligrams?

Both measure mass. The main difference is scale and common usage: {FromPlur} are used for smaller masses (ingredients, food labels, and lab work); {ToPlur} are used for very small amounts (medicine doses and high-precision measurement).

Where are grams and milligrams used?

In practice: {FromPlur} are used for smaller masses (ingredients, food labels, and lab work); {ToPlur} are used for very small amounts (medicine doses and high-precision measurement).

Why does 1 gram equal 1000 milligrams?

Because the units are defined with a fixed relationship. To convert, multiply by that factor.