Unit converter
Milligrams to Kilograms
Instant conversion in your browser — weight / mass.
Tip: enter the values one by one — 40 30 55 20 — and you get the total and the average.
1 mg = 0.000001 kg
Quick table Milligrams → Kilograms
| mg | kg |
|---|---|
| 1 | 0.000001 |
| 5 | 0.000005 |
| 10 | 0.00001 |
| 25 | 0.000025 |
| 50 | 0.00005 |
| 100 | 0.0001 |
| 500 | 0.0005 |
| 1,000 | 0.001 |
All unit families
- Lengthmm · cm · m · km · in · ft · yd · miAlmost the whole world measures length in metres. The exceptions are narrow but stubborn: the United States uses feet and inches for everyday distances, and the United Kingdom still posts road signs in miles while selling timber in millimetres.
- Temperature°C · °F · KTemperature is the one family here that is not a multiplication. Celsius and Fahrenheit have different zero points as well as different step sizes, so you need the formula: °F = °C × 9/5 + 32.
- Volumeml · l · m³ · gal · pt · fl oz · cupThis is the family where the same word means two different amounts. American and British measures share their names but not their sizes, and a recipe that ignores the difference will not work.
- Aream² · km² · ha · ft² · acAreas are where a linear conversion quietly goes wrong. One metre is 3.28 feet, but one square metre is 10.76 square feet — the factor is squared. Converting the sides and forgetting the square is the single most common mistake in this family.
- Speedkm/h · mph · m/s · knFour units, four different worlds. Kilometres per hour on European roads, miles per hour in the US and UK, metres per second in physics and weather bulletins, knots at sea and in the air.
- Times · min · h · d · wk · mo · yrSeconds, minutes, hours, days and weeks convert exactly. Months and years do not, and no converter can make them.
- Digital storagebit · B · KB · MB · GB · TBDigital storage has two conflicting definitions of the same prefixes, and almost every confusion about file sizes comes from that.
About this conversion
Weight / Mass conversion: 1 milligrams (mg) equals 0.000001 kg. As a practical reference, 1 mg = 0.000001 kg — common in recipes, shipping labels and gym tracking.
| mg | kg |
|---|---|
| 1 | 0.000001 |
Frequently asked questions
How do you convert milligrams to kilograms?
To go from mg to kg: multiply by 0.000001 (1 mg = 0.000001 kg). Example: 3 mg = 0.000003 kg. The converter above runs the math live as you type.
How much is 1 milligrams in kilograms?
1 mg equals 0.000001 kg. For other values, use the quick table or type your own number into the converter.
What are milligrams (mg)?
The milligram is one thousandth of a gram, the unit of medicine doses, vitamins and nutrition labels. A typical paracetamol tablet contains 500 mg of active ingredient.
What are kilograms (kg)?
The kilogram is the SI base unit of mass, since 2019 defined via the Planck constant rather than a metal cylinder in Paris. Body weight, groceries and gym plates use it everywhere outside the US — a liter of water weighs almost exactly 1 kg.