Converter

Weight Converter

Convert between metric and imperial weight units instantly. Supports milligrams, grams, kilograms, metric tons, ounces, pounds, stones, and US tons.

Quick Answer

1 kg = 2.205 lb. 1 lb = 0.4536 kg = 16 oz. 1 oz = 28.35 g. 1 stone = 14 lb. Select your units below and enter a value to convert between 8 weight units in real time.

Convert Weight

Enter a value and select units to convert.

1 Kilograms
2.204623 lb

All Equivalents

UnitValue
Milligrams (mg)1,000,000
Grams (g)1,000
Kilograms (kg)1
Metric Tons (t)0.001
Ounces (oz)35.273962
Pounds (lb)2.204623
Stones (st)0.15747304
US Tons (ton)0.00110231

About This Tool

The Weight Converter provides instant, accurate conversions between 8 commonly used weight and mass units across both metric and imperial systems. Whether you are converting recipe ingredients from ounces to grams, checking luggage weight limits in kilograms versus pounds, or working with industrial quantities in metric tons, this tool delivers real-time results as you type.

Understanding Weight Units

The metric system uses a decimal-based hierarchy: 1,000 milligrams make a gram, 1,000 grams make a kilogram, and 1,000 kilograms make a metric ton. The imperial system is less regular: 16 ounces make a pound, 14 pounds make a stone, and 2,000 pounds make a US ton (short ton). Understanding these relationships helps when converting between the two systems.

Common Uses

Weight conversion is essential in cooking (converting between metric and imperial recipes), fitness (tracking body weight across different scale units), shipping (meeting weight limits specified in different units), science (using the SI standard of kilograms), and international trade. Knowing that 1 kg is about 2.2 pounds is one of the most useful quick conversions to memorize.

Weight vs Mass

Technically, kilograms measure mass while pounds can measure either mass or force. In everyday use, the distinction rarely matters because we are measuring objects on Earth where gravitational acceleration is essentially constant. However, in scientific contexts, the distinction is important: a kilogram of mass weighs about 9.81 newtons of force on Earth's surface, but would weigh only 1.62 newtons on the Moon.

Frequently Asked Questions

How many pounds are in a kilogram?
One kilogram equals approximately 2.20462 pounds. Conversely, one pound equals approximately 0.453592 kilograms. To convert kg to pounds, multiply by 2.20462. For a quick mental estimate, double the kg value and add 10% of that result. For example, 70 kg is approximately 154 pounds (70 x 2 = 140, plus 14 = 154).
What is a stone and how does it relate to pounds?
A stone is a unit of weight equal to 14 pounds (approximately 6.35 kg). It is commonly used in the United Kingdom and Ireland to measure body weight. For example, a person weighing 150 pounds would be described as 10 stone 10 pounds (10 x 14 = 140, plus 10 = 150). The stone is rarely used outside of these countries.
What is the difference between a metric ton and a US ton?
A metric ton (also called a tonne) equals 1,000 kilograms or approximately 2,204.6 pounds. A US ton (also called a short ton) equals 2,000 pounds or approximately 907.2 kilograms. A metric ton is about 10% heavier than a US ton. There is also a long ton (used in the UK) which equals 2,240 pounds. In international trade and science, metric tons are standard.
How do I convert ounces to grams?
One ounce equals approximately 28.3495 grams. To convert ounces to grams, multiply by 28.3495. For a rough estimate, multiply ounces by 28. This conversion is commonly used in cooking (especially when following recipes from different countries) and for measuring precious metals and gems. Note that troy ounces (used for precious metals) are slightly heavier at 31.1035 grams.
Why do some countries use kilograms and others use pounds?
Most countries use kilograms as part of the International System of Units (SI), also known as the metric system. The United States primarily uses pounds, a legacy of the British imperial system. The UK uses a mix: kilograms for food labels and commerce (required by EU regulation, retained after Brexit), but stones and pounds for body weight in everyday conversation. Scientific and medical communities worldwide use kilograms exclusively.

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