Long Tons to Milligrams (ton (UK) to mg)

1 long ton equals 1,016,046,909 milligrams (rounded).

1 long ton = 1,016,046,909 milligrams

How to convert long tons to milligrams

To convert long tons to milligrams, multiply the number of long tons by 1,016,046,909. The factor is rounded to 10 significant digits. To go the other way, multiply milligrams by 9.842065276×10⁻¹⁰ (rounded).

milligrams = long tons × 1,016,046,909

Example: 10 long tons = 10,160,469,088 milligrams.

About these units

Long Ton (ton (UK))

Imperial (British)Current unit

2,240 pounds (1,016.05 kg), the imperial or UK ton. Also used for ship displacement.

Before the 15th century an English ton was 2,160 pounds, twenty hundredweight of 108 pounds. Nineteenth-century British definitions included 2,240, 2,352 and 2,400 pounds, though the legal ton was usually 2,240 lb, which is twenty hundredweight of 112 lb. Industry bent the rules: in the 17th and 18th century iron trade, workers were given a 2,240 lb ton of raw material but were expected to return a 2,400 lb ton of processed iron, allowing for waste, and some coal mines delivered long tons but paid miners for a shorter one, which the miners saw as unfair.

The long ton, about 1,016 kg, is within 2 percent of the metric tonne, which makes the two easy to mistake for each other. It is used in the UK, Ireland and most Commonwealth countries that followed the imperial system, although the tonne is now the legal trade unit in the UK, Canada and Australia. Ship displacement has traditionally been quoted in long tons, because a ship cannot be put on a scale and is instead measured by the weight of water it pushes aside. The 2,240 lb figure became the standard for ship design.

1 long ton = 1,016.046909 kilograms (approximately).

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

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

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