lb to kg Converter
Convert lb and kg, with common barbell weights for reference.
How It Works
Weightlifting uses both pounds and kilograms depending on where you train and which federation you compete in. Converting between the two is a constant need — whether you are following a program written in kg at a gym with lb plates, or vice versa.
The conversion is straightforward: 1 lb equals 0.4536 kg, and 1 kg equals 2.2046 lb. This calculator does both directions in real time. Type in either field and the other updates instantly.
The reference table below shows common weightlifting conversions so you can quickly recall that 135 lb is about 61 kg, 225 lb is about 102 kg, and so on without doing the math each time.
Worked Example
Input You need to convert 315 lb to kilograms.
Result 315 x 0.4536 = 142.9 kg. Conversely, 100 kg = 100 x 2.2046 = 220.5 lb.