Weight Converter

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

Mass
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Related Conversions
2 mg to g 5 mg to g 10 mg to g 12 mg to g 50 mg to g 75 mg to g 150 mg to g 600 mg to g 750 mg to g 1,000 mg to g 1,200 mg to g 3,000 mg to g
Reverse Conversions
20 g to mg 40 g to mg 75 g to mg 125 g to mg 250 g to mg 270 g to mg 330 g to mg 720 g to mg 750 g to mg 1,000 g to mg 1,200 g to mg 3,000 g to mg
More Weight Conversions
1 kg to lb 1 lb to kg 5 kg to lb 5 lb to kg 10 lb to kg 16 kg to g 30 kg to g 50 kg to g 50 lb to kg 70 kg to lb 100 lb to kg 200 lb to kg

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Common Benchmarks

Microwave oven 35 lb
Average newborn 7.5 lb
Laptop 4 lb
Car tire 25 lb
House cat 10 lb
Soccer ball 0.95 lb

Formula

g = mg × 0.001

Example

Example: convert 300 milligrams to grams.

300 mg = 0.3 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: 300 mg → 0.3 g

Frequently Asked Questions

How much is 300 milligrams in grams?

300 milligrams equals 0.3 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.