Weight Converter

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

Mass
3
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Related Conversions
1 mg to g 5 mg to g 30 mg to g 40 mg to g 50 mg to g 125 mg to g 150 mg to g 200 mg to g 480 mg to g 750 mg to g 800 mg to g 4,000 mg to g
Reverse Conversions
5 g to mg 10 g to mg 12 g to mg 50 g to mg 75 g to mg 100 g to mg 150 g to mg 200 g to mg 320 g to mg 440 g to mg 480 g to mg 640 g to mg
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 20 oz to g 50 lb to kg 70 kg to lb 100 lb to kg 150 oz to g 200 lb to kg

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Common Benchmarks

House cat 10 lb
Microwave oven 35 lb
Car tire 25 lb
Bowling ball 16 lb
Bag of flour 5 lb
Average newborn 7.5 lb

Formula

g = mg × 0.001

Example

Example: convert 400 milligrams to grams.

400 mg = 0.4 g

Conversion table

milligrams (mg) grams (g)
1 mg 0.001 g
2 mg 0.002 g
5 mg 0.005 g
10 mg 0.01 g
20 mg 0.02 g
50 mg 0.05 g
100 mg 0.1 g

Explanation

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

How to convert milligrams to grams

  1. Start with the value in milligrams (mg).
  2. Multiply it by 0.001.
  3. The result is the measurement in grams (g).

Example: 400 mg → 0.4 g

Frequently Asked Questions

How much is 400 milligrams in grams?

400 milligrams equals 0.4 grams.

How many grams is 1 milligram?

1 milligram equals 0.001 grams.

How many milligrams is 1 gram?

1 gram equals 1000 milligrams.

What is the difference between milligrams and grams?

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

Where are milligrams and grams used?

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

Why does 1 milligram equal 0.001 grams?

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