Kilograms to Long Tons Converter

How to Convert Kilograms to Long Tons

To convert a weight measurement from kilograms to long tons, divide the weight by the conversion factor. Since one kilogram is equal to 9.8421 × 10^-4 long tons, you can use this formula:

The weight in long tons is equal to the kilograms divided by 1,016.047.

How Many Long Tons Are in a Kilogram?

There are 9.8421 × 10^-4 long tons in one kilogram.

What Is a Kilogram?

The kilogram (symbol: kg) is the SI base unit of mass. Since 2019, it has been defined in terms of the Planck constant (h = 6.62607015 × 10⁻³⁴ J·s), replacing the previous definition based on a physical platinum-iridium cylinder stored in Paris. The kilogram is the fundamental unit of mass in science and the standard unit for everyday weighing in most countries. Body weight, food products, luggage allowances, and industrial materials are measured in kilograms throughout the metric world. One kilogram equals exactly 1,000 grams, approximately 2.20462 pounds, or about 35.274 ounces. The kilogram is the only SI base unit that includes a prefix (“kilo”) in its name, a historical artifact from when the gram was considered too small for practical use. In everyday terms, a litre of water at 4 °C has a mass of approximately 1 kg. A standard bag of sugar or flour is typically 1 kg in metric countries. A newborn baby weighs approximately 3–4 kg.

One kilogram is equal to:

• 1,000 grams (g)
• 1,000,000 milligrams (mg)
• 2.204623 pounds (lb)
• 35.27396 ounces (oz)
• 0.001 metric tons (MT)
• 0.157473 stones (st)
• 5,000 carats (ct)

What Is a Long Ton?

The long ton (also called the imperial ton or displacement ton) is an imperial unit of weight equal to exactly 2,240 pounds (1,016.0469088 kilograms). It was the traditional ton used in the United Kingdom before metrication. The long ton is approximately 12% heavier than the US short ton (2,000 lb) and approximately 1.6% heavier than the metric ton (2,204.62 lb). These differences are important in international shipping and trade to avoid confusion and financial discrepancies. The long ton is still used in some specific contexts: the displacement of warships and large vessels is sometimes quoted in long tons (particularly in historical and naval contexts). In the UK, the long ton was the standard “ton” before the adoption of the metric ton. The long ton contains exactly 160 stones (160 × 14 = 2,240 lb) or 20 hundredweight (20 × 112 = 2,240 lb). The hundredweight (cwt) of 112 pounds is the traditional British hundredweight, distinct from the US hundredweight of 100 pounds.

One long ton is equal to:

• 2,240 pounds (lb)
• 35,840 ounces (oz)
• 1,016.047 kilograms (kg)
• 1,016,047 grams (g)
• 1.016047 metric tons (MT)
• 1.12 tons (t)
• 160 stones (st)
• 5,080,235 carats (ct)

Understanding Weight and Mass Units

Weight and mass are related but distinct concepts. Mass is the amount of matter in an object and is constant regardless of location. Weight is the force of gravity acting on that mass and varies with gravitational field strength. In everyday language, “weight” and “mass” are used interchangeably, and the units on this page measure mass.

Weight and mass units have evolved from different historical measurement systems, resulting in a rich variety of units still in use today.

Major Unit Systems

• Metric / SI units: The kilogram (kg) is the SI base unit of mass. Grams (g) and milligrams (mg) are derived using standard prefixes. The metric ton (tonne, 1,000 kg) is used for large masses.
• US customary / Imperial units: The pound (lb) is the primary unit, with 16 ounces per pound. The US short ton (2,000 lb) and the imperial long ton (2,240 lb) are used for large masses. The stone (14 lb) is used in the UK for body weight.
• Specialised units: The carat (0.2 g) is used for gemstones. The Calorie (kcal) is used as a proxy for weight change based on the 3,500 kcal per pound approximation.

Key Conversion Relationships

• 1 pound (lb) = 453.59237 grams (exact by international agreement)
• 1 kilogram (kg) = 2.204623 pounds
• 1 ounce (oz) = 28.349523 grams = 1/16 pound
• 1 stone (st) = 14 pounds = 6.350293 kg
• 1 US ton (t) = 2,000 pounds = 907.185 kg
• 1 long ton (lt) = 2,240 pounds = 1,016.047 kg
• 1 metric ton (MT) = 1,000 kg = 2,204.623 pounds
• 1 carat (ct) = 0.2 grams = 200 milligrams (exact)

Tips for Weight Conversions

• The most important conversion to remember: 1 kg ≈ 2.2 lb. Multiply kilograms by 2.2 for a quick pounds estimate, or divide pounds by 2.2 for kilograms.
• For ounces to grams: 1 oz ≈ 28.35 g. Multiply ounces by 28 for a rough gram estimate.
• UK body weight in stones: divide pounds by 14. For example, 154 lb = 11 stone.
• Don’t confuse the three types of “ton”: US short ton = 2,000 lb, metric ton = 2,204.6 lb, long (imperial) ton = 2,240 lb.
• The metric ton is about 10% heavier than the US short ton. When reading international commodity prices, check which ton is being used.
• For gemstones: 1 carat = 0.2 grams exactly, so 5 carats = 1 gram. A 1-carat diamond is about the size of a pencil eraser top.
• Don’t confuse avoirdupois ounces (28.35 g, for general weighing) with troy ounces (31.10 g, for precious metals) or fluid ounces (a volume measure).
• The Calorie-to-weight conversion (3,500 kcal per pound) is a nutritional approximation, not a physical constant. It is useful for rough weight-loss estimates but not for precise calculations.

Kilograms to Long Tons Conversion Table

The following table shows conversions from kilograms to long tons.

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