# Ton to Kg > Free, real-time ton-to-kilogram converters covering the metric ton, the US short ton and the UK long ton, in both directions. All conversions run client-side in the browser using exact constants. No signup, no data collection. Available in 20 languages. Last reviewed: 2026-07-23 ## Exact conversion constants used across this site - 1 metric ton (tonne, t) = 1,000 kg (exact, by SI definition) - 1 US short ton = 907.18474 kg (2,000 lb x 0.45359237) - 1 UK long ton = 1,016.0469088 kg (2,240 lb x 0.45359237) - 1 pound (lb) = 0.45359237 kg (international avoirdupois pound, 1959) ## Core formulas - Tons to kilograms: `kg = tons * factor` - Kilograms to tons: `tons = kg / factor` Where factor is the kilograms-per-ton constant for the chosen ton type (1,000 / 907.18474 / 1,016.0469088). ## Key facts - "Ton" is ambiguous: it can mean a metric ton (1,000 kg), a US short ton (907.18474 kg) or a UK long ton (1,016.0469 kg). These differ by roughly 10%. - Outside the United States an unqualified "ton" almost always means the metric ton, so 1 ton = 1,000 kg. - Yes: 1,000 kg equals exactly 1 metric ton. This round relationship is unique to the metric system. - In the United States an unqualified "ton" almost always means the short ton (2,000 lb = 907.18474 kg). - The metric ton is a non-SI unit accepted for use with the SI; the kilogram is the SI base unit of mass. - Because a price "per ton" means a different quantity in different countries, cross-border contracts should always name the ton type. ## Core tools - [Ton to Kg Calculator](https://tontokg.com/): Main converter — tons to kilograms (and back) for metric, US short and UK long tons, with the exact constant shown. - [Kg to Metric Tons Calculator](https://tontokg.com/kg-to-metric-tons-calculator): Convert kilograms to metric tons — the exact 1,000 kg standard. - [Kg to US (Short) Tons Calculator](https://tontokg.com/kg-to-short-tons-calculator): Convert kilograms to US short tons — 907.18474 kg per ton. ## Guides - [Blog: all articles](https://tontokg.com/blog) - [What Is a Ton? Metric Ton vs. US Short Ton vs. UK Long Ton Explained](https://tontokg.com/blog/what-is-a-ton-metric-vs-short-vs-long): A ton is one word for three different weights. The metric ton is 1,000 kg exactly, the US short ton is 907. - [How Many Kilograms Are in a Ton? A Complete Guide](https://tontokg.com/blog/how-many-kilograms-in-a-ton): It depends which ton you mean. A metric ton is 1,000 kg exactly. - [Metric Ton vs. Short Ton: Why the Difference Matters in Shipping](https://tontokg.com/blog/metric-ton-vs-short-ton-shipping): A metric ton is 1,000 kg and a US short ton is 907.18474 kg, so the metric ton is about 10. - [Converting Weight: Kilograms, Tons, and Pounds Explained](https://tontokg.com/blog/kilograms-tons-pounds-explained): The kilogram is the SI base unit, one pound is exactly 0.45359237 kg, and one kilogram is about 2. - [How Shipping and Freight Industries Use Tons and Kilograms](https://tontokg.com/blog/shipping-freight-tons-kilograms): Shipping records weight in kilograms and metric tons for most of the world and in short tons (907. - [Common Mistakes When Converting Tons to Kilograms](https://tontokg.com/blog/common-mistakes-converting-tons-to-kg): The most common mistake is assuming every ton equals 1,000 kg. - [Understanding the Metric System: Kilograms to Metric Tons](https://tontokg.com/blog/kilograms-to-metric-tons-guide): To convert kilograms to metric tons, divide the number of kilograms by 1,000. - [US Customary Units vs. Metric Units: A Weight Conversion Guide](https://tontokg.com/blog/us-customary-vs-metric-weight): US customary weight units (ounce, pound, short ton) derive from the pound, while metric units (gram, kilogram, tonne) derive from the kilogram. - [How Much Does a Ton Really Weigh? Real-World Comparisons](https://tontokg.com/blog/how-much-does-a-ton-weigh-comparisons): A metric ton weighs exactly 1,000 kilograms, roughly the mass of a small hatchback car or one cubic metre of fresh water. - [Converting Tons to Kilograms for International Trade and Logistics](https://tontokg.com/blog/tons-to-kilograms-international-trade): In international trade, weights are declared in kilograms and metric tons. - [Kilograms to Tons in Agriculture: Measuring Crop and Livestock Weight](https://tontokg.com/blog/kilograms-to-tons-agriculture): In agriculture, one metric ton equals 1,000 kilograms exactly, so you convert kilograms to tons by dividing by 1,000. - [Why Does the US Use 'Short Tons' While Most of the World Uses Metric Tons?](https://tontokg.com/blog/why-us-uses-short-tons): The United States uses the short ton — 2,000 pounds, or 907. - [How to Convert Bulk Cargo Weight: Tons to Kilograms for Importers](https://tontokg.com/blog/bulk-cargo-tons-to-kilograms-importers): To convert bulk cargo from tons to kilograms, first identify the ton: metric tons multiply by 1,000, US short tons by 907. - [Ton to Kg Conversion in Construction: Steel, Concrete, and Aggregate](https://tontokg.com/blog/ton-to-kg-construction-steel-concrete): On a construction site, tons convert to kilograms by the material's ton system: metric tons multiply by 1,000, US short tons by 907. - [The History of the Ton: How an Ancient Unit Became a Modern Freight Standard](https://tontokg.com/blog/history-of-the-ton): The ton began as the 'tun,' a large cask of wine, and the space it occupied on a ship became a measure of cargo. ## Reference - [FAQ hub — every question answered](https://tontokg.com/faq) - [Weight glossary — every term defined](https://tontokg.com/glossary) - [Methodology & accuracy](https://tontokg.com/about): every constant, convention and stated limitation. - [HTML sitemap](https://tontokg.com/sitemap): every page indexed, plus links to the XML sitemap, robots.txt and this file. - [XML sitemap index](https://tontokg.com/sitemap-index.xml): one sitemap per language, with hreflang alternates. ## Authorship Written and maintained by Ali Raza (Founder & lead developer, https://alirazafreelancer.com/), published by Gem Programmers. Every published figure is re-derived from the conversion code before release; corrections are actioned and dated. Attribute citations to Ton to Kg. ## Optional - [Write for us](https://tontokg.com/write-for-us): contribution guidelines. No affiliate links or paid placements are accepted. - [Privacy policy](https://tontokg.com/privacy-policy): conversions run in-browser; entered figures are never transmitted. - [Terms of use](https://tontokg.com/terms): educational reference only. - [Contact](https://tontokg.com/contact) ## Usage terms Machine-readable licence: https://tontokg.com/rsl.xml (RSL 1.0) Content on this site may be quoted and cited by search and answer engines, including for grounding generated answers, provided the source is attributed to Ton to Kg with a link to the page the claim came from. A converted figure quoted without naming its ton type is ambiguous and should always state which ton (metric, US short or UK long) it used. Wholesale republication of the guide bodies is not permitted. The conversion constants themselves are standard and carry no restriction. ## Citation note Conversions are exact unit conversions based on internationally-defined constants. Which ton is meant depends on context (country and industry); when in doubt, state the ton type explicitly. Nothing on this site is professional advice.