Convert pounds (lb / lbs) to kilograms (kg), or kilograms to pounds, instantly. Enter a value in either field and the other unit updates automatically.
Common pound values
Common kilogram values
- The calculator uses the internationally defined avoirdupois pound, where 1 lb equals exactly 0.45359237 kg. Displayed results may be rounded based on the decimal-place setting.
Pounds to Kilograms Calculator
This pounds to kilograms calculator converts weight between pounds (lb / lbs) and kilograms (kg) in both directions. It is useful when a body weight, gym plate, package, product specification, or luggage limit is listed in a unit you do not normally use.
The calculator uses the exact avoirdupois pound conversion: 1 lb = 0.45359237 kg. In the other direction, 1 kg is approximately 2.20462262 lb.
How to convert pounds to kilograms
To convert pounds to kilograms, multiply the number of pounds by 0.45359237.
For example, 150 lb in kilograms is:
How to convert kilograms to pounds
To convert kilograms to pounds, divide the kilogram value by 0.45359237. You can also multiply by approximately 2.20462262.
For example, 70 kg is approximately 154.32 lb.
lb vs. lbs: is there a difference?
lb is the standard unit symbol for pound. In everyday English, lbs is also commonly typed when referring to multiple pounds. A value such as 150 lb and 150 lbs refers to the same amount of weight for a calculator conversion.
Pounds to kg conversion chart
The table below covers common pound values that often appear in body-weight, fitness, shipping, and product-weight searches. For values between these rows, enter the exact number in the calculator above.
Common gym weight conversions
U.S. gyms often label plates and dumbbells in pounds, while international equipment may use kilograms. A 45 lb plate is about 20.41 kg, while a 20 kg plate is about 44.09 lb. These values are close, but they are not identical, which matters when comparing total barbell weight across lb- and kg-based gyms.
Quick mental conversion: lb to kg
For a rough estimate, divide pounds by 2.2. For example, 220 lb ÷ 2.2 is about 100 kg. This shortcut is convenient for mental math, but use the calculator when you need a more precise conversion because the exact factor is 0.45359237 kg per pound.
When is a pounds-to-kilograms converter useful?
- Body weight: convert a U.S. weight in pounds for a form, fitness app, or metric record.
- Gym equipment: compare dumbbells, plates, kettlebells, and machines labeled in lb or kg.
- Travel: compare luggage weights shown in pounds and kilograms.
- Shipping: convert package or freight weight between U.S. customary and metric units.
- Product specifications: compare weights from U.S. and international product listings.
Frequently Asked Questions
- Q. How many kilograms are in 1 pound?A. 1 pound is exactly 0.45359237 kilograms.
- Q. How many pounds are in 1 kilogram?A. 1 kilogram is approximately 2.20462 pounds.
- Q. How much is 45 lbs in kg?A. 45 lb is approximately 20.41 kg.
- Q. How much is 100 lbs in kg?A. 100 lb is approximately 45.36 kg.
- Q. How much is 150 lbs in kg?A. 150 lb is approximately 68.04 kg.
- Q. How much is 200 lbs in kg?A. 200 lb is approximately 90.72 kg.
- Q. How much is 70 kg in pounds?A. 70 kg is approximately 154.32 lb.
- Q. Is lb the same as lbs?A. For weight conversion, yes. "lb" is the standard symbol, while "lbs" is a common informal plural spelling used in everyday searches and labels.
