# Converting weight and length units

Sometimes you need to convert the units of a given measure to keep a unified format across your study. These conversions are usually inches or feet to centimetres and pounds to kilograms, or vice-versa. In all these cases, we can use  a simple operation to get it done. See some examples below:

### inches to cm

```var cent = {your_variable_in_inches} * 2.54;
cent.toFixed(2);```

*The toFixed() method will format the output value with the amount of decimal positions specified in the parentheses. In this case, 2.

### cm to inches

```var inch = {your_variable_in_cm} / 2.54;
inch.toFixed(2);```

### feet to cm

```var cent = {your_variable_in_feet} * 30.48;
cent.toFixed(2);```

### cm to feet

```var feet = {your_variable_in_cm} / 30.48;
feet.toFixed(2);```

### pounds to kg

```var kilog = {your_variable_in_pounds} * 0.4536;
kilog.toFixed(2);```

### kg to pounds

```var pounds = {your_variable_in_kg} / 0.4536;
pounds.toFixed(2);```
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