Input Grams(g):
<input type="text" name="grams" id="grams"><br>
<br>
<button type="button" onclick="kilo()">Kilogram</button>
<p id="convert"></p>
<script type="text/javascript">
function kilo(){
}
Input Grams(g): <input type="text" name="grams" id="grams">
<br>
Results: <p id="convert"></p>
<button onclick="kilo()">Kilogram</button>
<script type="text/javascript">
function kilo() {
document.getElementById('convert').innerHTML =
(document.getElementById('grams').value/1000 + "kg");
}
</script>