Pounds to Kilograms Converter
Convert pounds (lbs) to kilograms (kg) and vice versa instantly. Fast, accurate weight conversion for fitness tracking, science, shipping, cooking, and everyday use.
What Is the Pound to Kilogram Conversion?
The pound (lb) is a unit of weight commonly used in the United States and other countries that follow the imperial system. The kilogram (kg) is the base unit of mass in the International System of Units (SI), used in most countries worldwide.
The exact conversion factor is:
1 pound = 0.45359237 kilograms
1 kilogram = 2.2046226218 pounds
This converter supports both directions — pounds to kilograms and kilograms to pounds — making it easy to switch between imperial and metric weight units for fitness tracking, science, shipping, cooking, and everyday use.
How Does the Pounds to Kilograms Converter Work?
The calculator uses the exact conversion factor:
- lbs → kg: Multiply the number of pounds by 0.45359237.
- kg → lbs: Multiply the number of kilograms by 2.2046226218.
Simply select the conversion direction, enter a value, and the calculator will instantly compute the result. You can also swap between lbs → kg and kg → lbs with the swap button.
Why Use This Pounds to Kilograms Converter?
- Bidirectional: Convert lbs to kg and kg to lbs.
- High Precision: Uses the exact conversion factor (0.45359237).
- Reference Table: Quick reference for common conversions.
- Free & Private: No registration, no data storage.
- Mobile-Friendly: Works on any device.
Common Pound to Kilogram Conversions
- 1 lb = 0.45359237 kg
- 5 lbs = 2.26796 kg
- 10 lbs = 4.53592 kg
- 50 lbs = 22.6796 kg
- 100 lbs = 45.3592 kg
- 150 lbs = 68.0389 kg
- 200 lbs = 90.7185 kg
❓ Pounds to Kilograms Converter FAQ
How many kilograms are in a pound?
Exactly 0.45359237 kilograms. This is the exact conversion factor used by the calculator.
How many pounds are in a kilogram?
Exactly 2.2046226218 pounds. This is the reciprocal of the pound-to-kilogram conversion factor.
How do I convert pounds to kilograms?
Multiply the number of pounds by 0.45359237. For example: 150 lbs × 0.45359237 = 68.0389 kg. The calculator does this for you automatically.
How do I convert kilograms to pounds?
Multiply the number of kilograms by 2.2046226218. For example: 68 kg × 2.2046226218 = 149.914 lbs. The calculator handles this conversion instantly.
What is the abbreviation for pounds?
Pounds are abbreviated as "lbs" or "lb". The abbreviation comes from the Latin word "libra".
What is the abbreviation for kilograms?
Kilograms are abbreviated as "kg".
How do I convert 150 pounds to kilograms?
150 lbs × 0.45359237 = 68.0388555 kg. The calculator gives you the exact result instantly.
How do I convert 68 kilograms to pounds?
68 kg × 2.2046226218 = 149.914338 lbs. The calculator handles this for you.
Why are pounds and kilograms different?
Pounds are part of the imperial system of measurement, used primarily in the United States. Kilograms are part of the metric system (SI), used in most countries worldwide. The conversion factor allows easy conversion between the two systems.
What is the difference between mass and weight?
Mass is the amount of matter in an object, measured in kilograms. Weight is the force of gravity on that mass, measured in pounds (force) or newtons. In everyday use, the terms are often used interchangeably.
Can I use this calculator for cooking measurements?
Yes. This calculator is perfect for converting recipes between imperial and metric units. Many recipes list ingredients in pounds or ounces, while others use kilograms or grams.
Can I use this calculator for shipping weights?
Yes. Shipping companies often use pounds (US) or kilograms (international). This calculator helps you convert between the two units for accurate shipping calculations.
What is the difference between a pound and a kilogram?
A pound is approximately 0.4536 kilograms. A kilogram is approximately 2.2046 pounds. The kilogram is the base unit of mass in the metric system, while the pound is the standard unit of weight in the imperial system.
How many ounces are in a pound?
There are 16 ounces (oz) in one pound (lb).
How many grams are in a kilogram?
There are 1,000 grams (g) in one kilogram (kg).
Is this calculator accurate?
Yes. The calculator uses the exact conversion factor (0.45359237 for lbs to kg) and provides results with high precision. You can adjust the decimal precision in the advanced options.
What is the pound to kilogram conversion factor?
The exact conversion factor is 0.45359237. This is the internationally agreed-upon value for the pound-to-kilogram conversion.
What is the kilogram to pound conversion factor?
The exact conversion factor is 2.2046226218. This is the reciprocal of the pound-to-kilogram conversion factor.
Can I convert fractional pounds to kilograms?
Yes. The calculator accepts decimal values, so you can convert weights like 5.5 lbs or 2.75 kg with precision.