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Milligram Converters

Convert milligrams to grams, micrograms, kilograms, ounces, pounds and grains, and back again.

What this tool does

Convert milligrams to grams, micrograms, kilograms, ounces, pounds and grains, and back again. Type an amount in milligrams, choose the units, and the tool converts it to grams. It offers 7 mass units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one: Milligram, Gram, Microgram, Kilogram, Ounce (avoirdupois), Pound (avoirdupois), Grain. Starts as Milligram.
  • To: Choose one of the same 7 units as "From". Starts as Gram.

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from milligrams to grams:

  • 1 mg = 0.001 g
  • 5 mg = 0.005 g
  • 10 mg = 0.01 g
  • 50 mg = 0.05 g
  • 100 mg = 0.1 g

Multiply the number of milligrams by 0.001 to get grams. Both units are exact definitions, so 0.001 is the exact factor: 1 mg = 0.001 g.

Sources: Milligram: SI Brochure, 9th edition (2019, updated 2022), Table 7 (SI prefixes). Gram: SI Brochure, 9th edition (2019).

Limitations

  • Converts the unit of a mass only. It does not work out a dose or a concentration.

FAQs

Q: How many milligrams are in a gram?
A: One gram is exactly 1000 milligrams.
Q: How many micrograms are in a milligram?
A: One milligram is exactly 1000 micrograms.

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