To convert pounds (lbs) to kilograms (kg), you can use the following step-by-step instructions:

Step 1: Understand the conversion factor

1 lb is equal to approximately 0.45359237 kg. This is the conversion factor we will use to convert pounds to kilograms.

Step 2: Set up the conversion equation

To convert 126 lbs to kg, we can set up the equation as follows:

126 lbs * (0.45359237 kg/1 lb)

Step 3: Cancel out the units

In the equation, the unit “lbs” appears in both the numerator and denominator. This allows us to cancel out the unit and only keep the desired unit “kg”.

Step 4: Perform the calculation

Now, we can multiply the numerical values:

126 * 0.45359237 = 57.15255362

Step 5: Round the answer (if necessary)

Since weight is often rounded to a certain number of decimal places, you can round the answer to an appropriate number of decimal places. In this case, let’s round to two decimal places.

The final answer is 57.15 kg.

Therefore, 126 lbs is approximately equal to 57.15 kg.