Kilogram is 1000 gram units.
Kilograms to Long tons Converter — kg to long ton
Convert Kilogram (kg) to Long ton (long ton) using the exact conversion factor (1 kilogram = 0.0009842065 long ton). See the formula, worked examples, conversion table, history, and common uses.
Kilograms to Long tons converter
Converter
Mass/Weight Converter
Convert SI mass, imperial weight, jewelry, atomic, and astronomy mass units.
Context values
Some unit families need one extra value for a physically accurate result.
A British long ton is 2,240 pounds.
Result = input x 1 / 1016.046909.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Kilograms to Long tons
Weight conversions between Kilogram and Long ton come up constantly in everyday commerce, shipping, and cooking, since US packaging is usually labeled in pounds while most of the rest of the world uses kilograms. Kilogram is most often used for pricing and labeling goods sold by weight in retail and commodity trade.
Formula
long tons = kilograms × 0.000984206527611
This factor comes from each unit's defined relationship to the category's base unit: 1 kilogram equals 1 base unit, and 1 long ton equals 1016.0469088 base units, so dividing one by the other gives the direct kilogram-to-long ton factor of 0.000984206527611.
Simple example
1 kg × 0.0009842065276 = 0.0009842065 long ton
1 kilogram = 0.0009842065 long tons.
Real-world example
50 kg × 0.0009842065276 = 0.0492103264 long ton
50 kilograms = 0.0492103264 long tons.
Conversion table
| Kilogram (kg) | Long ton (long ton) |
|---|---|
| 1 kg | 0.0009842065 long ton |
| 5 kg | 0.0049210326 long ton |
| 10 kg | 0.0098420653 long ton |
| 25 kg | 0.0246051632 long ton |
| 50 kg | 0.0492103264 long ton |
| 100 kg | 0.0984206528 long ton |
Reverse conversion: Long ton to Kilogram
0.0009842065 long ton × 1016.046909 = 0.9999999719 kg
0.0009842065 long tons = 0.9999999719 kilograms.
kilograms = long tons × 1016.0469088
For a page dedicated to this direction, see Long ton to Kilogram.
Understanding the Kilogram
Kilogram (kg) measures mass. The kilogram is the SI base unit of mass; every other SI mass unit is a decimal multiple or fraction of it. It is classified as a SI base unit.
Where it's used: Used as the standard mass unit in nearly every country except the United States and a few others that primarily use the pound.
Uses of the Kilogram today
- Pricing and labeling goods sold by weight in retail and commodity trade
- Dosing calculations in medicine, especially for pediatric and weight-based prescriptions
- Structural and material specification in metric-system engineering
- Scientific measurement of mass across chemistry, physics, and materials research
History of the Kilogram
The kilogram's direct predecessor was the 'grave,' defined by the French Academy of Sciences in 1793 as the mass of one cubic decimeter of water at its temperature of maximum density. Because 'grave' echoed the aristocratic title 'graf,' revolutionary France's decree of 18 Germinal, Year III (7 April 1795) renamed the system: the gram became the reference unit, defined as the mass of one cubic centimeter of water at the melting point of ice, and the kilogram — one thousand grams — took over the grave's practical role.
Turning that water-based definition into a physical object required real experimental work: chemist Louis Lefèvre-Gineau was tasked in 1795 with measuring precisely how much a cubic decimeter of water weighed, and former royal jeweller Marc-Étienne Janety then fabricated a platinum cylinder to embody that measured mass. Deposited in the French National Archives in 1799, it became known as the Kilogramme des Archives.
The metric system spread unevenly — Napoleon briefly restricted its use — but France made it compulsory in 1840, and the 1875 Metre Convention (signed by seventeen nations including the US) established the BIPM and a shared international prototype. The platinum-iridium International Prototype of the Kilogram, adopted in 1889 and nicknamed 'Le Grand K,' served as the world's mass reference for over a century.
On 20 May 2019, the kilogram was redefined by fixing the Planck constant at exactly 6.62607015 × 10⁻³⁴ joule-seconds, so it can now be realized in a laboratory (via a Kibble balance) without reference to any physical object.
Historical origin. Kilogram was not the invention of a single named person; it developed through the process described above.
Understanding the Long ton (long ton)
A British long ton is 2,240 pounds.
Kilogram — sources
- BIPM — The kilogram (SI base unit) — Official definition and history since the 2019 redefinition.
- NIST — Kilogram: The Past — History of the kilogram standard from the grave to the International Prototype Kilogram.
- SI Brochure, 9th edition (2019), Appendix 2 — BIPM — Official text of the Planck-constant-based definition of the kilogram.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many long tons are in 1 kilogram?
1 kilogram equals 0.0009842065 long tons, using the exact defined conversion factor rather than an estimate.
How do I convert kilogram to long ton?
Multiply the kilogram value by 0.0009842065276. The converter above does this instantly to whatever precision you set.
How do I convert long ton back to kilogram?
Use the reverse factor: 1 long ton equals 1,016.046909 kilograms. You can also use the swap control in the converter above to flip the direction instantly.
What is a kilogram?
Kilogram (kg) measures mass. The kilogram is the SI base unit of mass; every other SI mass unit is a decimal multiple or fraction of it. It is classified as a SI base unit.
What is a long ton?
Long ton (long ton) is a unit of mass/weight.
Is the kilogram to long ton conversion exact?
Yes. Both kilogram and long ton are defined by fixed standards rather than physical artifacts, so the factor of 0.0009842065276 used above is exact to as many digits as you choose to display.
Where is the kilogram still used today?
Used as the standard mass unit in nearly every country except the United States and a few others that primarily use the pound.