Milligrams to Short Tons (mg to ton (US))

1 milligram equals 1.102311311×10⁻⁹ short tons (rounded).

1 milligram = 1.102311311×10⁻⁹ short tons

How to convert milligrams to short tons

To convert milligrams to short tons, multiply the number of milligrams by 1.102311311×10⁻⁹. The factor is rounded to 10 significant digits. To go the other way, multiply short tons by 907,184,740.

short tons = milligrams × 1.102311311×10⁻⁹

Example: 10 milligrams = 1.102311311×10⁻⁸ short tons.

About these units

Milligram (mg)

Metric (SI)Current unit

One thousandth of a gram. Used for medicine doses and vitamins.

No single inventor can be credited with the milligram. It arrived with the metric system that France introduced in the 1790s, where the gram was the basic unit of mass and thousandths of it were named with a prefix. When the International System of Units was later built around the kilogram, the rule against stacked prefixes meant that a millionth of a kilogram is written 1 mg, never a microkilogram, so the milligram remained a gram-based unit even though the gram itself is not the SI base.

A milligram is small enough that doses of medicine and vitamins are measured in it routinely. A US penny weighs about 2.5 g, so a milligram is roughly one 2,500th of a coin. The unit is also at the center of a well-known safety problem: milligram and microgram differ by a factor of 1,000, and the abbreviation mcg for micrograms is used on prescriptions precisely so that a handwritten micro sign cannot be misread as milli. Confusing the two has caused serious medication errors.

1 milligram = 0.000001 kilograms (exactly).

Sources: Wikipedia: Milligram; Wikipedia: Microgram; Wikipedia: Gram

Short Ton (ton (US))

US customaryCurrent unit

2,000 pounds (907.18 kg). The ton used in the United States.

Wine casks lie behind every kind of ton. The word comes from tun, the term for the largest cask, and a tun of wine held roughly 2,000 pounds and took up about 60 cubic feet of cargo space. The short ton of 2,000 pounds keeps that round figure. It is used mainly in the United States and in some Canadian industries, while most of the world uses the tonne or, in the Commonwealth, the long ton.

The short ton is about 907 kg, roughly 10 percent less than a metric tonne, so the two should never be swapped when reading a statistic. The long and metric tons, by contrast, differ from each other by less than 2 percent. Weighing cargo on land is easy, but ships are traditionally described by displacement in long tons, so American shipping and naval documents can contain both kinds of ton at once. A freight bill may also use a measurement ton, which is a volume of 40 cubic feet. When writing for an international audience, spelling out short ton avoids confusion.

1 short ton = 907.18474 kilograms (exactly).

Sources: Wikipedia: Ton; NIST Guide to the SI, Appendix B.8 (mass conversions)

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