Pounds to Kilograms Converter
Convert pounds to kilograms instantly with our free online tool. Essential for fitness, medical, and international shipping needs.
Weight ConverterPounds
Kilograms
lb to kg Conversion Formula
To convert pounds to kilograms, multiply the pound value by 0.453592. The international avoirdupois pound is legally defined as exactly 0.45359237 kilograms.
Pounds to Kilograms Conversion Table
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Related Weight Conversions
Why Use Our lb to kg Converter
Instant Weight Conversion
Get precise pound to kilogram results in real-time as you type — perfect for gym workouts and meal planning
Medical-Grade Precision
Uses the exact international standard of 0.45359237 kg per pound for results you can trust in any context
Weight Reference Table
Common pound values at a glance — from 1 lb to 300 lb — for fitness, shipping, and cooking
Swap Instantly
Toggle between pounds and kilograms with one click — ideal for reading international fitness content
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No account needed. Convert as many weights as you need — always free, no restrictions
Fully Private
All calculations run locally in your browser. Your weight data never leaves your device
How to Convert Pounds to Kilograms
Enter Your Weight in Pounds
Type the pound value — for example, enter 165 for a 165 lb body weight
See the Kilogram Result
The result appears instantly: 165 lb = 74.843 kg — your weight in the metric system
Copy or Reverse
Copy the result or click Swap to convert kilograms back to pounds
Use the Conversion Table
Check the table for common values like 10 lb = 4.536 kg or 150 lb = 68.039 kg
Frequently Asked Questions
How many kilograms are in 1 pound?
1 pound equals 0.453592 kilograms (approximately 0.45 kg). This is based on the international avoirdupois pound definition of exactly 0.45359237 kg.
How do I convert my body weight from pounds to kg?
Multiply your weight in pounds by 0.453592. For example, 180 lb × 0.453592 = 81.647 kg. A quick estimate: divide pounds by 2.2 (180 ÷ 2.2 ≈ 81.8 kg).
What is 150 pounds in kilograms?
150 pounds equals 68.039 kilograms. This is a common reference weight — roughly the average adult weight in many countries, and also the weight of a large golden retriever.
How do I convert plate weights at the gym from lb to kg?
Standard Olympic plates: 45 lb = 20.412 kg (international plates are 20 kg), 35 lb = 15.876 kg, 25 lb = 11.340 kg, 10 lb = 4.536 kg, and 5 lb = 2.268 kg. Note that a 45 lb US plate is slightly heavier than a 20 kg international plate.
Is 1 kg more than 1 pound?
Yes, 1 kilogram is 2.20462 pounds, so a kilogram is more than double a pound. A 1-pound steak is about 454 grams (0.454 kg), while a 1 kg steak weighs about 2.2 pounds.
About Pounds to Kilograms Converter
Our free online pounds to kilograms converter provides instant, accurate weight conversions for any purpose. Whether you are tracking your fitness progress with a program from another country, calculating medication dosages, determining shipping weights for international parcels, or following a recipe with metric measurements, this tool delivers reliable results. The pound is the primary weight unit in the United States, while kilograms are the global standard used by 195 countries worldwide.
Expert Tips for lb to kg Conversion
The exact conversion is 1 lb = 0.45359237 kg, established by the 1959 international agreement. For everyday use, 0.4536 or even 0.454 is sufficiently precise.
For gym use, note the difference between US and international plates: a US 45 lb barbell plate is 20.41 kg, while an international competition plate is exactly 20 kg (44.09 lb). Over multiple plates, this 0.41 kg difference adds up.
In aviation, baggage allowances are typically 50 lb (22.68 kg) for US domestic or 23 kg (50.71 lb) for international. Always check which unit your airline uses.
For newborns, birth weight in the US is recorded in pounds and ounces. A 7 lb 8 oz baby weighs 7.5 × 0.453592 = 3.402 kg. The global average birth weight is about 3.4 kg (7.5 lb).
In the kitchen, a pound of butter (453.6 g) is slightly less than 500 g (a common metric butter package in Europe). When a US recipe calls for 1 lb of an ingredient, using 450 g is close enough for most cooking.