I found the best way to input a numeric value is using a spinner. The users can type in the user, and they can use up and down arrow to adjust the value. That is very good user experiences. There is a similar component in WinForm, but there is not such input html field for web. Luckily, JQuery offers a solution for this purpose. It can convert a text field into a numeric field. You need to call this javascript

Code

Please go to JQuery.ui.spinner website for further information