Convert 20 g to mg

How to convert grams to milligrams

1. Formula: milligrams = grams × 1,000
2. Put in the value: 20 grams.
3. Result: 20,000 milligrams.

Grams to milligrams table

Converting the other way: milligrams to grams

grams = milligrams × 0.001. So 20,000 milligrams is back to 20 grams; one milligram is 0.001 grams. See the milligrams to grams table.

Quick estimate in your head

For a rough answer, multiply by about 1000: 20 × 1000 ≈ 20,000 mg, against the exact 20,000 mg (0.0% out). Good enough to check that a calculated result is sensible.

Common mistakes

The usual slip is using the factor the wrong way round. A gram is bigger than a milligram, so the number of milligrams must come out larger than the number of grams. If your answer goes the other way, divide instead of multiplying.

About the units

Gram (g) and milligram (mg) are both units of mass. One gram equals 1,000 milligrams, and one milligram equals 0.001 grams. Results on this page are rounded for display; the conversion itself uses the exact definitions.

Mass conversions come up in cooking and baking, shipping and luggage limits, body weight, medicine doses and buying food by weight.

20 grams in other units

The most readable unit for this amount is grams (20).

• 20,000 mg
• 0.02 kg
• 0.00002 t
• 0.70547924 oz
• 0.04409245 lb
• 0.00314946 st
• 0.00002205 ton
• 100 ct

How this answer was calculated

The result is worked out from the numbers in this page's address when the page is opened, using exact arithmetic wherever possible and rounding only for display. Nothing is copied from a printed table. If you think an answer is wrong, please tell us through the contact page and we will check it.

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