Milligram (mg)
A milligram is one thousandth of a gram, used for very small masses such as medication dosages.
Milligrams are standard on prescription labels, supplement facts panels, and analytical chemistry.
Milligram to Kilogram
Convert milligram to kilogram instantly. Type in either field — results update live.
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Weight & Mass Milligram Kilogram
1 milligram = 0.000001 kilograms
Unit
Unit
Conversion table
Selected mg values converted to kg using the exact factor from this tool.
| mg | kg |
|---|---|
| 0.01 | 1e-8 |
| 0.1 | 1e-7 |
| 1 | 0.000001 |
| 2 | 0.000002 |
| 3 | 0.000003 |
| 5 | 0.000005 |
| 10 | 0.00001 |
| 20 | 0.00002 |
| 50 | 0.00005 |
| 100 | 0.0001 |
| 1,000 | 0.001 |
How to convert
Exact conversion factors in both directions, plus a worked example.
1 mg = 0.000001 kg
1 kg = 1000000 mg
To convert milligram to kilogram, multiply by 0.000001.
To convert kilogram to milligram, multiply by 1000000.
Example: convert 15 mg to kg
15 × 0.000001 = 0.000015 kg
About these units
Short background on the units used in this conversion.
Kilogram (kg)
The kilogram is the SI base unit of mass, defined by fixing the numerical value of the Planck constant.
Kilograms are used worldwide for body weight, food packaging, shipping labels, and science wherever the metric system is standard.
Frequently asked questions
How many kilograms are in one milligram?
One milligram equals 0.000001 kilograms. Multiply your milligrams value by 0.000001 to convert to kilograms.
What is the conversion formula?
kg = mg × 0.000001The reverse is
mg = kg × 1,000,000, using the same exact factors as this converter.Is this Milligram to Kilogram converter private?
Yes. All calculations run locally in your browser. Nothing you type is sent to a server.
All milligram conversions
Jump to any weight & mass conversion starting from milligram — including the reverse direction and every other unit in our dataset.
kilogram (kg) → milligram (mg)
milligram (mg) → gram (g)milligram (mg) → microgram (µg)milligram (mg) → centigram (cg)milligram (mg) → decigram (dg)milligram (mg) → dekagram (dag)milligram (mg) → hectogram (hg)milligram (mg) → metric ton (tonne) (t)milligram (mg) → picogram (pg)milligram (mg) → nanogram (ng)milligram (mg) → femtogram (fg)milligram (mg) → attogram (ag)milligram (mg) → megagram (Mg)milligram (mg) → gigagram (Gg)milligram (mg) → teragram (Tg)milligram (mg) → petagram (Pg)milligram (mg) → exagram (Eg)milligram (mg) → pound (lb)milligram (mg) → ounce (oz)milligram (mg) → stone (st)milligram (mg) → short ton (us) (ton)milligram (mg) → long ton (uk) (long ton)milligram (mg) → hundredweight (us) (cwt)milligram (mg) → hundredweight (uk) (cwt-UK)milligram (mg) → quarter (us) (qr)milligram (mg) → dram (avoirdupois) (dr)milligram (mg) → grain (gr)milligram (mg) → slugmilligram (mg) → troy ounce (oz t)milligram (mg) → dram (apothecary) (dr ap)milligram (mg) → troy pound (lb t)milligram (mg) → pennyweight (dwt)milligram (mg) → carat (ct)milligram (mg) → atomic mass unit (u)milligram (mg) → planck mass (mₚ)milligram (mg) → electron mass (mₑ)milligram (mg) → proton mass (mₚ⁺)milligram (mg) → neutron mass (mₙ)milligram (mg) → solar mass (M☉)milligram (mg) → earth mass (M⊕)milligram (mg) → quintal (q)milligram (mg) → mommemilligram (mg) → cattymilligram (mg) → piculmilligram (mg) → arrobamilligram (mg) → macemilligram (mg) → baht (gold)milligram (mg) → talent (biblical)milligram (mg) → minamilligram (mg) → shekel