Conversion Result
What is Weight Conversion?
Weight conversion refers to the process of converting a mass (weight) expressed in one unit into another unit.
For example, converting 1 kg to grams (g) gives 1000 g, and converting to pounds (lb) gives about 2.2046 lb.
Why Weight Conversion is Needed
International Trade: Different countries use different units, so standardization is necessary.
Science and Industry: Accurate unit conversion is essential in experiments, manufacturing, and logistics.
Everyday Life: Cooking, health management (body weight), and shopping often involve various units.
How to Use the Weight Converter
The weight converter is a tool that automatically calculates when you enter a value and select the units to convert.
How to Use
Enter the input value (e.g., 10)
Select the original unit (e.g., kg)
Select the target unit (e.g., lb)
Check the result (e.g., 10 kg = 22.046 lb)
Conversion Formula
Result = Input Value × (Reference Unit Factor[Original Unit]) ÷ (Reference Unit Factor[Target Unit])
Frequently asked questions (FAQs)
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What is the basis for weight conversion calculations?
All units are converted based on the International System of Units (SI) base unit, the kilogram (kg). For example, pounds (lb) are first converted to kg and then to the desired unit.
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Why do conversion results have so many decimal places?
Conversion ratios between units use highly accurate values (e.g., 1 lb = 0.45359237 kg), which can result in long decimal numbers. Use rounding if needed.
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Are ton and metric tonne the same?
No. A metric tonne equals 1000 kg, while a UK long ton is about 1016 kg and a US short ton is about 907 kg.
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Why are pounds (lb) and ounces (oz) used in both the US and UK?
Pounds and ounces are commonly used in both countries, but there may be slight regional differences. The converter uses international standard values.
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Why is a carat (ct) such a small value?
A carat is a unit for gemstone weight. 1 ct = 0.0002 kg (200 mg). It is mainly used for diamonds and precious metals.
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Why are Dalton (Da) and atomic mass unit (amu) needed?
These units are used in chemistry and biology to represent the mass of atoms and molecules. They are rarely used in everyday life.
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Why are traditional Korean units (Geun, Don) included?
Traditional Korean units are still used in specific contexts such as gold, silver, and agricultural products, so they are included in the converter.
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Why do conversion results sometimes differ?
Some units have different definitions depending on the region. The converter uses internationally accepted standard values.
Conversion units and descriptions
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Kilogram (kg)
The base unit of mass in the International System of Units (SI). Commonly used in science, industry, and everyday life.
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Gram (g)
1/1000 of a kilogram. Used for measuring small quantities such as food and medicine.
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Milligram (mg)
1/1000 of a gram. Used in pharmaceuticals and chemical experiments for very small masses.
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Microgram (µg)
1/1000 of a milligram. Used for extremely small quantities of substances.
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Tonne (t)
1000 kg. Used for large cargo and industrial weight measurements.
International Units
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Pound (lb)
A widely used unit of mass in the US and UK. 1 lb ≈ 0.45359237 kg.
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Ounce (oz)
1/16 of a pound. Commonly used for food and precious metals.
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Stone (st)
Used in the UK for body weight. 1 st = 14 lb ≈ 6.35029318 kg.
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Grain (gr)
A very small unit. Used for ammunition and medicine. 1 grain ≈ 0.00006479891 kg.
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Long Ton (UK ton)
UK ton. 1 long ton = 2240 lb ≈ 1016.0469088 kg.
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Short Ton (US ton)
US ton. 1 short ton = 2000 lb ≈ 907.18474 kg.
Imperial / US Customary Units
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Metric Tonne (t)
SI-based ton. 1 tonne = 1000 kg. Used in international trade and industry.
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Carat (ct)
A unit for gemstone weight. 1 ct = 0.0002 kg (200 mg).
Metric & Industrial Units
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Dalton (Da)
A unit of atomic and molecular mass. 1 Da ≈ 1.66053906660 × 10⁻²⁷ kg.
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Atomic Mass Unit (amu)
Same as Dalton. Used in chemistry and biology for molecular mass calculations.
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Slug (slug)
An engineering unit used in the US. 1 slug ≈ 14.59390294 kg. Mainly used in mechanics.
Special Units
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Geun (근)
A traditional Korean unit. 1 geun ≈ 0.6 kg. Historically used for agricultural products and meat.
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Don (돈)
A traditional Korean unit. 1 don ≈ 0.00375 kg. Commonly used for gold and silver.
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Nyang (兩)
A traditional Chinese unit. 1 nyang ≈ 0.05 kg. Used for silver coins and precious metals.
Historical / Regional Units