Pounds to Kilograms Converter
Convert imperial pounds (lbs) to metric kilograms (kg) instantly. A precise tool for international shipping, airline luggage limits, grocery shopping, and logistics.
Kilograms (kg)
Imperial vs. Metric Units
Pounds (lbs) are primarily used in the United States and the United Kingdom for weighing body weight, produce, and light freight. Kilograms (kg) are the international metric standard, offering consistency for scientific, commercial, and athletic records around the world.
What is a Pound?
The international avoirdupois pound is legally defined as exactly 0.45359237 kilograms. It is derived from the latin word "libra" (lb).
What is a Kilogram?
A kilogram is the base unit of mass in the metric system. It is used globally to maintain consistent measures of weight in physics and medicine.
Conversion Formula
Standard Constant
kg = lbs × 0.45359237
To get kilograms from pounds, multiply the value by 0.45. To convert back, multiply the kilograms by 2.2.
Lbs to Kg Quick Reference
Pounds (lbs) Kilograms (kg) 1 lb 0.45 kg 5 lbs 2.27 kg 10 lbs 4.54 kg 20 lbs 9.07 kg 50 lbs 22.68 kg 100 lbs 45.36 kg Global Shipping & Luggage Standards
Standard Limit Imperial (lbs) Metric (kg) FedEx/UPS Small Parcel 5 lbs 2.27 kg Standard Carry-on 15 lbs 6.80 kg Medium Shipping Box 30 lbs 13.61 kg Budget Airline Limit 40 lbs 18.14 kg Standard Checked Bag 50 lbs 22.68 kg Heavy/First Class Bag 70 lbs 31.75 kg Max Courier Weight 150 lbs 68.04 kg Weight FAQ