Pounds to Kilograms Converter
1 pound = 0.453592 kilograms
Convert Pounds (lb) to Kilograms (kg) instantly.
Conversion Formula
kilograms = pounds x 0.453592
To convert pounds to kilograms, multiply by 0.453592. The pound is defined as exactly 0.45359237 kilograms by international agreement.
Pounds to Kilograms Table
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 1 | 0.453592 |
| 5 | 2.26796 |
| 10 | 4.53592 |
| 50 | 22.6796 |
| 100 | 45.3592 |
| 130 | 58.967 |
| 150 | 68.0389 |
| 180 | 81.6466 |
| 200 | 90.7185 |
| 250 | 113.398 |
About Pounds to Kilograms
The pounds-to-kilograms conversion is needed whenever Americans interact with metric-based systems - from international shipping to medical prescriptions to fitness tracking.
A standard bowling ball weighs about 14 lbs, which is 6.35 kg. A gallon of water weighs 8.34 lbs (3.78 kg). A newborn baby averages 7.5 lbs (3.4 kg) at birth.
In medicine, drug dosages are calculated per kilogram of body weight. If a patient weighs 180 lbs (81.6 kg) and needs a medication dosed at 5 mg/kg, the doctor prescribes 408 mg. Getting this conversion wrong can have serious consequences.
Shipping and freight also rely heavily on this conversion. FedEx international rates are based on kilograms. A 50-lb package equals 22.7 kg. Heavy freight at 2,000 lbs converts to 907.2 kg, just under a metric ton.
In the gym, when traveling abroad, all equipment is in kilograms. Your 45-lb plates become 20.4 kg, and a 135-lb bench press (three plates in the US) is about 61.2 kg.
For a quick mental shortcut: divide pounds by 2.2, or multiply by 0.45. So 200 lbs is roughly 200/2.2 = 91 kg (actual: 90.7 kg).
Frequently Asked Questions
How many kg is 150 pounds?
150 pounds equals 68.04 kilograms, commonly rounded to 68 kg.
How do I convert lbs to kg quickly?
Divide the pound value by 2.2 for a quick estimate. For example, 220 lbs / 2.2 = 100 kg. For more precision, multiply by 0.4536.
Is a pound the same as a lb?
Yes, "lb" is the abbreviation for pound, derived from the Latin "libra pondo" (a pound by weight). 1 lb = 1 pound = 0.4536 kg.
What is the difference between lbs and kg for body weight?
Pounds (lbs) are used in the US and UK. Kilograms (kg) are used everywhere else. A person weighing 160 lbs is 72.6 kg. Medical and scientific contexts worldwide use kg.