Convert 1 kg to mg

How to convert kilograms to milligrams

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

Kilograms to milligrams table

Converting the other way: milligrams to kilograms

kilograms = milligrams × 0.000001. So 1,000,000 milligrams is back to 1 kilogram; one milligram is 0.000001 kilograms. See the milligrams to kilograms table.

Quick estimate in your head

For a rough answer, multiply by about 1000000: 1 × 1000000 ≈ 1,000,000 mg, against the exact 1,000,000 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 kilogram is bigger than a milligram, so the number of milligrams must come out larger than the number of kilograms. If your answer goes the other way, divide instead of multiplying.

About the units

Kilogram (kg) and milligram (mg) are both units of mass. One kilogram equals 1,000,000 milligrams, and one milligram equals 0.000001 kilograms. 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.

1 kilogram in other units

The most readable unit for this amount is kilograms (1).

• 1,000,000 mg
• 1,000 g
• 0.001 t
• 35.273962 oz
• 2.204623 lb
• 0.15747304 st
• 0.00110231 ton
• 5,000 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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