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.
Kilogram to Milligram
Convert kilogram to milligram instantly. Type in either field — results update live.
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Weight & Mass Kilogram Milligram
1 kilogram = 1,000,000 milligrams
Unit
Unit
Conversion table
Selected kg values converted to mg using the exact factor from this tool.
| kg | mg |
|---|---|
| 0.01 | 10,000 |
| 0.1 | 100,000 |
| 1 | 1,000,000 |
| 2 | 2,000,000 |
| 3 | 3,000,000 |
| 5 | 5,000,000 |
| 10 | 10,000,000 |
| 20 | 20,000,000 |
| 50 | 50,000,000 |
| 100 | 100,000,000 |
| 1,000 | 1,000,000,000 |
How to convert
Exact conversion factors in both directions, plus a worked example.
1 kg = 1000000 mg
1 mg = 0.000001 kg
To convert kilogram to milligram, multiply by 1000000.
To convert milligram to kilogram, multiply by 0.000001.
Example: convert 5 kg to mg
5 × 1000000 = 5000000 mg
About these units
Short background on the units used in this conversion.
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.
Frequently asked questions
How many milligrams are in one kilogram?
One kilogram equals 1,000,000 milligrams. Multiply your kilograms value by 1,000,000 to convert to milligrams.
What is the conversion formula?
mg = kg × 1,000,000The reverse is
kg = mg × 0.000001, using the same exact factors as this converter.Is this Kilogram to Milligram converter private?
Yes. All calculations run locally in your browser. Nothing you type is sent to a server.
All kilogram conversions
Jump to any weight & mass conversion starting from kilogram — including the reverse direction and every other unit in our dataset.
milligram (mg) → kilogram (kg)
kilogram (kg) → gram (g)kilogram (kg) → microgram (µg)kilogram (kg) → centigram (cg)kilogram (kg) → decigram (dg)kilogram (kg) → dekagram (dag)kilogram (kg) → hectogram (hg)kilogram (kg) → metric ton (tonne) (t)kilogram (kg) → picogram (pg)kilogram (kg) → nanogram (ng)kilogram (kg) → femtogram (fg)kilogram (kg) → attogram (ag)kilogram (kg) → megagram (Mg)kilogram (kg) → gigagram (Gg)kilogram (kg) → teragram (Tg)kilogram (kg) → petagram (Pg)kilogram (kg) → exagram (Eg)kilogram (kg) → pound (lb)kilogram (kg) → ounce (oz)kilogram (kg) → stone (st)kilogram (kg) → short ton (us) (ton)kilogram (kg) → long ton (uk) (long ton)kilogram (kg) → hundredweight (us) (cwt)kilogram (kg) → hundredweight (uk) (cwt-UK)kilogram (kg) → quarter (us) (qr)kilogram (kg) → dram (avoirdupois) (dr)kilogram (kg) → grain (gr)kilogram (kg) → slugkilogram (kg) → troy ounce (oz t)kilogram (kg) → dram (apothecary) (dr ap)kilogram (kg) → troy pound (lb t)kilogram (kg) → pennyweight (dwt)kilogram (kg) → carat (ct)kilogram (kg) → atomic mass unit (u)kilogram (kg) → planck mass (mₚ)kilogram (kg) → electron mass (mₑ)kilogram (kg) → proton mass (mₚ⁺)kilogram (kg) → neutron mass (mₙ)kilogram (kg) → solar mass (M☉)kilogram (kg) → earth mass (M⊕)kilogram (kg) → quintal (q)kilogram (kg) → mommekilogram (kg) → cattykilogram (kg) → piculkilogram (kg) → arrobakilogram (kg) → macekilogram (kg) → baht (gold)kilogram (kg) → talent (biblical)kilogram (kg) → minakilogram (kg) → shekel