How to make <label> and <input> appear on the same line on an HTML form?

I am creating a registration form for a website. I want each label and its corresponding input element to appear on the same line.

Here's my code:

 <form action="" method="post" name="registration" class="register">

  <fieldset>

   <label for="Student"> Name: </label>
   <input name="Student" />
   <label for="Matric_no"> Matric number: </label>
   <input name="Matric_no" />
   <label for="Email"> Email: </label>
   <input name="Email" />
   <label for="Username"> Username: </label>
   <input name="Username" />
   <label for="Password"> Password: </label>
   <input name="Password" type="password" />

   <input name="regbutton" type="button" class="button" value="Register" />
  </fieldset>

 </form>
</div>  

#form {
 background-color: #FFF;
 height: 600px;
 width: 600px;
 margin-right: auto;
 margin-left: auto;
 margin-top: 0px;
 border-top-left-radius: 10px;
 border-top-right-radius: 10px;
 padding: 0px;
}

label {
 font-family: Georgia, "Times New Roman", Times, serif;
 font-size: 18px;
 color: #333;
 height: 20px;
 width: 200px;
 margin-top: 10px;
 margin-left: 10px;
 text-align: right;
 clear: both;
}

input {
 height: 20px;
 width: 300px;
 border: 1px solid #000;
 margin-top: 10px;
 float: left;
}

Assuming you want to float the elements, you would also have to float the label elements too.

Something like this would work:

label {
    /* Other styling... */
    text-align: right;
    clear: both;
    float:left;
    margin-right:15px;
}

#form {
    background-color: #FFF;
    height: 600px;
    width: 600px;
    margin-right: auto;
    margin-left: auto;
    margin-top: 0px;
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
    padding: 0px;
    text-align:center;
}
label {
    font-family: Georgia, "Times New Roman", Times, serif;
    font-size: 18px;
    color: #333;
    height: 20px;
    width: 200px;
    margin-top: 10px;
    margin-left: 10px;
    text-align: right;
    clear: both;
    float:left;
    margin-right:15px;
}
input {
    height: 20px;
    width: 300px;
    border: 1px solid #000;
    margin-top: 10px;
    float: left;
}
input[type=button] {
    float:none;
}

<div id="form">
    <form action="" method="post" name="registration" class="register">
        <fieldset>
            <label for="Student">Name:</label>
            <input name="Student" id="Student" />
            <label for="Matric_no">Matric number:</label>
            <input name="Matric_no" id="Matric_no" />
            <label for="Email">Email:</label>
            <input name="Email" id="Email" />
            <label for="Username">Username:</label>
            <input name="Username" id="Username" />
            <label for="Password">Password:</label>
            <input name="Password" id="Password" type="password" />
            <input name="regbutton" type="button" class="button" value="Register" />
        </fieldset>
    </form>
</div>

Alternatively, a more common approach would be to wrap the input/label elements in groups:

<div class="form-group">
    <label for="Student">Name:</label>
    <input name="Student" id="Student" />
</div>

#form {
    background-color: #FFF;
    height: 600px;
    width: 600px;
    margin-right: auto;
    margin-left: auto;
    margin-top: 0px;
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
    padding: 0px;
    text-align:center;
}
label {
    font-family: Georgia, "Times New Roman", Times, serif;
    font-size: 18px;
    color: #333;
    height: 20px;
    width: 200px;
    margin-top: 10px;
    margin-left: 10px;
    text-align: right;
    margin-right:15px;
    float:left;
}
input {
    height: 20px;
    width: 300px;
    border: 1px solid #000;
    margin-top: 10px;
}

<div id="form">
    <form action="" method="post" name="registration" class="register">
        <fieldset>
            <div class="form-group">
                <label for="Student">Name:</label>
                <input name="Student" id="Student" />
            </div>
            <div class="form-group">
                <label for="Matric_no">Matric number:</label>
                <input name="Matric_no" id="Matric_no" />
            </div>
            <div class="form-group">
                <label for="Email">Email:</label>
                <input name="Email" id="Email" />
            </div>
            <div class="form-group">
                <label for="Username">Username:</label>
                <input name="Username" id="Username" />
            </div>
            <div class="form-group">
                <label for="Password">Password:</label>
                <input name="Password" id="Password" type="password" />
            </div>
            <input name="regbutton" type="button" class="button" value="Register" />
        </fieldset>
    </form>
</div>

Note that the for attribute should correspond to the id of a labelable element, not its name. This will allow users to click the label to give focus to the corresponding form element.

I found "display:flex" style is a good way to make these elements in same line. No matter what kind of element in the div. Especially if the input class is form-control,other solutions like bootstrap, inline-block will not work well.

Example:

<div style="display:flex; flex-direction: row; justify-content: center; align-items: center">
    <label for="Student">Name:</label>
    <input name="Student" />
</div>

More detail about display:flex:

flex-direction: row, column

justify-content: flex-end, center, space-between, space-around

align-items: stretch, flex-start, flex-end, center

aaa##HTML I would suggest you wrap them in a div, since you will likely end up floating them in certain contexts.

<div class="input-w">
    <label for="your-input">Your label</label>
    <input type="text" id="your-input" />
</div>

CSS

Then within that div, you can make each piece inline-block so that you can use vertical-align to center them - or set baseline etc. (your labels and input might change sizes in the future...

.input-w label, .input-w input {
    float: none; /* if you had floats before? otherwise inline-block will behave differently */
    display: inline-block;
    vertical-align: middle;    
}

jsFiddle

UPDATE: mid 2016 + with mobile-first media queries and flex-box

This is how I do things these days.

HTML

<label class='input-w' for='this-input-name'>
  <span class='label'>Your label</span>
  <input class='input' type='text' id='this-input-name' placeholder='hello'>
</label>

<label class='input-w' for='this-other-input-name'>
  <span class='label'>Your label</span>
  <input class='input' type='text' id='this-other-input-name' placeholder='again'>
</label>

SCSS

html { // https://www.paulirish.com/2012/box-sizing-border-box-ftw/
  box-sizing: border-box;
  *, *:before, *:after {
    box-sizing: inherit;
  }
} // if you don't already reset your box-model, read about it

.input-w {
  display: block;
  width: 100%; // should be contained by a form or something
  margin-bottom: 1rem;
  @media (min-width: 500px) {
    display: flex;
    flex-direction: row;
    align-items: center;
  }
  .label, .input {
    display: block;
    width: 100%;
    border: 1px solid rgba(0,0,0,.1);
    @media (min-width: 500px) {
      width: auto;
      display: flex;
    }
  }
  .label {
    font-size: 13px;
    @media (min-width: 500px) {
      /* margin-right: 1rem; */
      min-width: 100px; // maybe to match many?
    }
  }
  .input {
    padding: .5rem;
    font-size: 16px;
    @media (min-width: 500px) {
      flex-grow: 1;
      max-width: 450px; // arbitrary
    }
  }
}

jsFiddle

For Bootstrap 4 it could be done with class="form-group" style="display: flex"

<div class="form-group" style="display: flex">
    <label>Topjava comment:</label>
    <input class="form-control" type="checkbox"/>
</div>

What you were missing was the float: left; here is an example just done in the HTML

<div id="form">
<form action="" method="post" name="registration" class="register">
    <fieldset>
        <label for="Student" style="float: left">Name:</label>
        <input name="Student" />
        <label for="Matric_no" style="float: left">Matric number:</label>
        <input name="Matric_no" />
        <label for="Email" style="float: left">Email:</label>
        <input name="Email" />
        <label for="Username" style="float: left">Username:</label>
        <input name="Username" />
        <label for="Password" style="float: left">Password:</label>
        <input name="Password" type="password" />
        <input name="regbutton" type="button" class="button" value="Register" />
    </fieldset>
</form>

The more efficient way to do this is to add a class to the labels and set the float: left; to the class in CSS

Aside from using floats, as others have suggested, you can also rely on a framework such as Bootstrap where you can use the "horizontal-form" class to have the label and input on the same line.

If you're unfamiliar with Bootstrap, you would need to include:

• the link to the Bootstrap CSS (the top link where it says < -- Latest compiled and minified CSS -- >), in the head, as well as add some divs:
• div class="form-group"
• div class="col-..."
• along with class="col-sm-2 control-label" in each label, as Bootstrap shows, which I included below.
• I also reformatted your button so it's Bootstrap compliant.
• and added a legend, to your form box, since you were using a fieldset.

It's very straight forward and you wouldn't have to mess with floats or a ton of CSS for formatting, as you listed above.

  <div id="form">
    <div class="row">
      <form action="" method="post" name="registration" class="register form-horizontal">
        <fieldset>
        <legend>Address Form</legend>

      <div class="form-group">
        <label for="Student" class="col-sm-2 control-label">Name:</label>
          <div class="col-sm-6">
            <input name="Student" class="form-control">
          </div>
      </div>

      <div class="form-group">
        <label for="Matric_no" class="col-sm-2 control-label">Matric number: </label>
          <div class="col-sm-6">
            <input name="Matric_no" class="form-control">
          </div>
      </div>

      <div class="form-group">
        <label for="Email" class="col-sm-2 control-label">Email: </label>
          <div class="col-sm-6">
            <input name="Email" class="form-control">
          </div>
      </div>

      <div class="form-group">
        <label for="Username" class="col-sm-2 control-label">Username: </label>
          <div class="col-sm-6">
            <input name="Username" class="form-control">
          </div>
      </div>

      <div class="form-group">
        <label for="Password" class="col-sm-2 control-label">Password: </label>
          <div class="col-sm-6">
            <input name="Password" type="password" class="form-control">
          </div>
      </div>

      <div>
        <button class="btn btn-info" name="regbutton" value="Register">Submit</button>
      </div>

      </fieldset>
    </form>
    </div>
  </div>
</div>

I am using Angular 6 with Bootstrap 4 and find this way works:

<div class="form-group row">
    <div class="col-md-2">
        <label for="currentPassword">Current Password:</label>
    </div>
    <div class="col-md-6">
        <input type="password" id="currentPassword">
    </div>
</div>

I've done this several different ways but the only way I've found that keeps the labels and corresponding text/input data on the same line and always wraps perfectly to the width of the parent is to use display:inline table.

CSS

.container {
  display: inline-table;
  padding-right: 14px;
  margin-top:5px;
  margin-bottom:5px;
}
.fieldName {
  display: table-cell;
  vertical-align: middle;
  padding-right: 4px;
}
.data {
  display: table-cell;
}

HTML

<div class='container'>
    <div class='fieldName'>
        <label>Student</label>
    </div>
    <div class='data'>
        <input name="Student" />
    </div>
</div>
<div class='container'>
    <div class='fieldName'>
        <label>Email</label>
    </div>
    <div class='data'>
      <input name="Email" />
    </div>
</div>

Wrap the label and the input within a bootstraps div

<div class ="row">
  <div class="col-md-4">Name:</div>
  <div class="col-md-8"><input type="text"></div>
</div>

This thing works well.It put radio button or checkbox with label in same line without any css. <label><input type="radio" value="new" name="filter">NEW</label> <label><input type="radio" value="wow" name="filter">WOW</label>

#form {
    background-color: #FFF;
    height: 600px;
    width: 600px;
    margin-right: auto;
    margin-left: auto;
    margin-top: 0px;
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
    padding: 0px;
    text-align:center;
}
label {
    font-family: Georgia, "Times New Roman", Times, serif;
    font-size: 18px;
    color: #333;
    height: 20px;
    width: 200px;
    margin-top: 10px;
    margin-left: 10px;
    text-align: right;
    margin-right:15px;
    float:left;
}
input {
    height: 20px;
    width: 300px;
    border: 1px solid #000;
    margin-top: 10px;
}

<div id="form">
    <form action="" method="post" name="registration" class="register">
        <fieldset>
            <div class="form-group">
                <label for="Student">Name:</label>
                <input name="Student" />
            </div>
            <div class="form-group">
                <label for="Matric_no">Matric number:</label>
                <input name="Matric_no" />
            </div>
            <div class="form-group">
                <label for="Email">Email:</label>
                <input name="Email" />
            </div>
            <div class="form-group">
                <label for="Username">Username:</label>
                <input name="Username" />
            </div>
            <div class="form-group">
                <label for="Password">Password:</label>
                <input name="Password" type="password" />
            </div>
            <input name="regbutton" type="button" class="button" value="Register" />
        </fieldset>
    </form>
</div>

Another option is to place a table inside the form. (see below) I know tables are frowned upon by some people but I think they work nicely when it comes to responsive form layouts.

<FORM METHOD="POST" ACTION="http://www.cs.tut.fi/cgi-bin/run/~jkorpela/echo.cgi">
<TABLE BORDER="1">
  <TR>
    <TD>Your name</TD>
    <TD>
      <INPUT TYPE="TEXT" NAME="name" SIZE="20">
    </TD>
  </TR>
  <TR>
    <TD>Your E-mail address</TD>
    <TD><INPUT TYPE="TEXT" NAME="email" SIZE="25"></TD>
  </TR>
</TABLE>
<P><INPUT TYPE="SUBMIT" VALUE="Submit" NAME="B1"></P>
</FORM>