Question

I have a simple conversion form from kg to lbs.

html

<input type="text" id="kg" name="kg">
<input type="text" id="lbs" name="lbs">

I have it setup so that the lbs box updates while you type in the kg box with this code.

jQuery

$("#kg").keyup(function(){
    $('#lbs').val($('#kg').val()*2.20462);
});

How do I get the lbs value to round to 2 decimals places? I am sure it is something fairly simple but all the examples I found online are for if the number is stored in a variable.

Answer 1

use toFixed:

$('#lbs').val(($('#kg').val()*2.20462).toFixed(2));

---

number.toFixed( [digits] )

Parameter

digits The number of digits to appear after the decimal point; this
may be a value between 0 and 20, inclusive, and implementations may
optionally support a larger range of values. If this argument is
omitted, it is treated as 0.

Returns

A string representation of number that does not use exponential
notation and has exactly digits digits after the decimal place. The
number is rounded if necessary, and the fractional part is padded with
zeros if necessary so that it has the specified length. If number is
greater than 1e+21, this method simply calls Number.toString() and
returns a string in exponential notation.