Código HTML:
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js" type="text/javascript"></script> <form> <input type="radio" name="1" value="0" checked="checked">0 <input type="radio" name="1" value="1">1 <br> <input type="radio" name="2" value="0" checked="checked">0 <input type="radio" name="2" value="1">1 <br> <input type="radio" name="3" value="0" checked="checked">0 <input type="radio" name="3" value="1">1 <br> <output></output> </form> <script> $("form>input[type='radio']:checked").each(function( index ) { var suma += (parseFloat($("input[name='index']:checked").val())); }); $("output").text(suma); </script>