Convert weight between kilograms (kg) and pounds (lb) with step-by-step solutions and conversion formulas.
• 1 kg = 2.205 lb
• 5 kg = 11.023 lb
• 10 kg = 22.046 lb
• 1 lb = 0.454 kg
Enter a weight and click Convert
Convert between kilograms and pounds with step-by-step solutions
The kilogram (kg) and pound (lb) are two of the most commonly used units of mass in the world. Kilograms are the standard unit of mass in the International System of Units (SI) and are used by most countries worldwide. Pounds, on the other hand, are part of the imperial system and are primarily used in the United States, United Kingdom (for body weight), and a few other countries.
Converting between kilograms and pounds is essential in many everyday situations, from understanding your body weight when traveling internationally to converting product weights for shipping or cooking. Our Kg to Lb Converter provides instant, accurate conversions with complete step-by-step solutions.
Whether you're a fitness enthusiast tracking your weight, a chef following international recipes, or a business professional dealing with international shipping, understanding how to convert between these units is invaluable. This converter makes it simple and provides the mathematical steps so you can understand the conversion process.
lb = kg × 2.20462
or more precisely
lb = kg × 2.20462262185
Example: Convert 75 kg to pounds
lb = 75 × 2.20462
lb = 165.3465
75 kg = 165.35 lb (rounded)
kg = lb × 0.453592
or more precisely
kg = lb × 0.45359237
Example: Convert 150 lb to kilograms
kg = 150 × 0.453592
kg = 68.0388
150 lb = 68.04 kg (rounded)
Choose "kg to lb" to convert kilograms to pounds, or "lb to kg" to convert pounds to kilograms.
Type the weight you want to convert. Accepts positive numbers including decimals.
Press the Convert button or hit Enter to see the converted weight with step-by-step solution and additional unit conversions.
| Kilograms (kg) | Pounds (lb) | Common Use |
|---|---|---|
| 0.5 | 1.10 | Small package |
| 1 | 2.20 | Bag of sugar |
| 5 | 11.02 | Bag of flour |
| 10 | 22.05 | Carry-on bag |
| 50 | 110.23 | Child's weight |
| 70 | 154.32 | Average adult |
| 100 | 220.46 | Larger adult |
Airlines often have weight limits in different units. US carriers may use pounds while international airlines use kilograms. Convert your luggage weight to avoid excess baggage fees when traveling internationally.
Gym equipment in the US often displays weights in pounds, while bodyweight scales might use kilograms. Understanding conversions helps you track progress regardless of the equipment used.
International recipes often specify ingredients in kilograms or grams, while American recipes use pounds and ounces. Converting accurately ensures your dishes turn out perfectly.
International shipping requires weight declarations in specific units. Accurate conversions are essential for customs declarations, shipping costs, and compliance with regulations.
Patient weights are recorded in different units depending on the country. Accurate conversions are crucial for medication dosing, which is often calculated based on body weight.
Boxing, wrestling, and other sports have weight classes. Athletes competing internationally need to understand weight limits in both measurement systems.
The kilogram was originally defined in 1795 during the French Revolution as the mass of one liter of water at its freezing point. It was redefined in 1799 as the mass of the International Prototype of the Kilogram (IPK), a platinum-iridium cylinder kept in France. In 2019, the kilogram was redefined based on the Planck constant, making it a truly universal measurement.
The pound has ancient origins, with the word coming from the Latin "libra pondo" meaning "a pound by weight." Various pound standards existed throughout history, but the modern avoirdupois pound (used for most weighing) was standardized in 1959 by international agreement as exactly 0.45359237 kilograms.
Today, while most of the world uses the metric system with kilograms as the standard unit of mass, the United States remains the largest country still primarily using pounds for everyday measurements. The UK uses a mix, with kilograms for most purposes but pounds and stones still common for body weight.
One kilogram equals approximately 2.20462 pounds. For most practical purposes, you can use 2.2 as the conversion factor. The exact value is 2.20462262185 pounds per kilogram.
One pound equals exactly 0.45359237 kilograms (by international definition). For everyday use, 0.45 or 0.454 provides sufficient accuracy.
Both "lb" and "lbs" are correct abbreviations for pounds. "Lb" is technically correct as it comes from the Latin "libra," but "lbs" is commonly used in informal writing to indicate plural. The official symbol is "lb" for both singular and plural.
Technically, mass (measured in kilograms) is the amount of matter in an object, while weight is the force of gravity on that mass. However, on Earth's surface, the terms are often used interchangeably since the gravitational force is constant.
Simply multiply your weight in kilograms by 2.205. For example, if you weigh 70 kg, your weight in pounds is 70 × 2.205 = 154.35 lbs. Use our calculator above for precise conversions.
A stone is a British unit of weight equal to 14 pounds (6.35 kg). It's commonly used in the UK and Ireland for measuring body weight. For example, a person weighing 150 pounds would be 10 stone 10 pounds.
The United States, Liberia, and Myanmar are the only countries that haven't officially adopted the metric system. The UK uses a mix, with most commerce in metric but personal weight often still expressed in stones and pounds.
Our converter uses the internationally recognized exact conversion factor (1 lb = 0.45359237 kg). The results are accurate to many decimal places, far beyond what's needed for any practical application.
Understanding how to convert between kilograms and pounds is an essential skill in our globally connected world. Whether you're traveling internationally, following fitness programs, cooking with international recipes, or conducting business across borders, this conversion knowledge proves invaluable.
Our Kg to Lb Converter makes these conversions instant and accurate, with step-by-step solutions to help you understand the mathematics behind the conversion. Use this tool whenever you need reliable weight conversion with detailed explanations, and bookmark it for easy access whenever you need to convert between metric and imperial weight units!