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Weight/Mass Conversion: mg to kg, kg to mg

Use the online conversion calculators to convert between milligrams (mg) and kilograms (kg).

Conversion Calculators

Enter your value in one of the conversion calculators below to convert mg to kg or convert kg to mg.

Convert mg to kg

Convert kg to mg

How to convert mg to kg: Use the conversion calculator on the left-hand side titled "Convert mg to kg". Enter a value in the mg field and click on the "Calculate kg" button. Your answer will appear in the kg field.

How to convert kg to mg: Use the conversion calculator on the right-hand side titled "Convert kg to mg". Enter a value in the kg field and click on the "Calculate mg" button. Your answer will appear in the mg field.

Definitions

Below are definitions relating to these conversion formulas:

Unit Symbol Measurement System Description
ounces oz US Customary Units (and Imperial)  
pounds lbs or lb US Customary Units (and Imperial) 1 lb = 16 oz
short tons T US Customary Units (and Imperial) 1 short ton = 2000 lbs
milligrams mg Metric System 1000 mg = 1 g
centigrams cg Metric System 100 cg = 1 g, 1 cg = 10 mg
decigrams dg Metric System 10 dg = 1 g, 1 dg = 10 cg
grams g Metric System 1 g = 1000 mg or 100 cg or 10 dg
kilograms kg Metric System 1 kg = 1000 g
metric tons t Metric System 1 metric ton = 1000 kg