The approximation we use for kilograms (kg) to pounds (lb) is 1 kg = 2.2 lb. To convert from kilogram to pound, we multiply by 2.2. \(\text{kilogram}~\rightarrow~\times\text{2.2}~\rightarrow\text ...

so they often like to know a conversion. As a rule of thumb we know 2.2 lbs is the same as a kilogram. So for example, a 10 kg dumbbell would be 22 lbs. Imperial units such as feet, pints ...