function Funtpcal() {
  var consiz = document.getElementById("consiz").value;
  var cmsn = document.getElementById("cmsn").value;

  var x = document.getElementById("tp_vol").value;
  var y = document.getElementById("tp_op").value;
  var w = document.getElementById("tp_tp").value;

    var z = -(((cmsn-100000)*(y*consiz*x))+(100000*w))/((cmsn+100000)*consiz*x);
    document.getElementById("tp").innerHTML = z.toFixed(3);
}

<input type="number" id="consiz" value="1000">
<input type="number" id="cmsn" value="1">
<input type="number" id="tp_vol" value="11.35">
<input type="number" id="tp_op" value="110">
<input type="number" id="tp_tp" value="100">

<input type="button" onclick="Funtpcal()" value="Calculate">
<span id="tp"></span>