<form>
    <div class="prog"></div>
    <input type="checkbox" name="progress-tasks" id="progress-task1" value="Task 1" checked required>
    <label for="progress-task1" class="progress-task">Task 1</label>
    <input type="checkbox" name="progress-tasks" id="progress-task2" value="Task 2" checked required>
    <label for="progress-task2" class="progress-task">Task 2</label>
    <input type="checkbox" name="progress-tasks" id="progress-task3" value="Task 3" required>
    <label for="progress-task3" class="progress-task">Task 3</label>
    <input type="checkbox" name="progress-tasks" id="progress-task4" value="Task 4" required>
    <label for="progress-task4" class="progress-task">Task 4</label>
    <input type="checkbox" name="progress-tasks" id="progress-task5" value="Task 5" required>
    <label for="progress-task5" class="progress-task">Task 5</label>
    <input type="checkbox" name="progress-tasks" id="progress-task6" value="Task 6" required>
    <label for="progress-task6" class="progress-task">Task 6</label>
    <label for="progress-tasks-percentage" class="progress-tasks-completed"><span>0</span><sup>%</sup> Completed</label>
    <progress id="progress-tasks-percentage" name="progress-tasks-percentage" min="0" max="100"></progress>
  </form>
@import "compass/css3";

@import url(http://weloveiconfonts.com/api/?family=entypo);

body {
  background: #2c3642;
  color: #fff;
}

form {
  position: relative;
  border: 5px solid #59616C;
  border-radius: 400px;
  width: 400px;
  height: 400px;
  margin: 24px auto;
}

input[type=checkbox] {
  position: absolute; 
  overflow: hidden; 
  clip: rect(0 0 0 0); 
  height: 1px; 
  width: 1px; 
  margin: -1px; 
  padding: 0;
  border: 0;
}

label.progress-task {
  position: absolute;
  left: 0;
  width: 400px;
  cursor: pointer;
  font: 32px/345px sans-serif;
  text-align: center;
  color: transparent;
}

label.progress-task:before,
label.progress-task:after {
  position: absolute;
  display: block;
  width: 24px;
  height: 24px;
  content: ' ';
  border-radius: 24px;
  cursor: pointer;
}

label.progress-task:before {
  border: 5px solid #59616c;
  z-index: 1;
}

label.progress-task:after {
  background: #2c3642;
  border: 12px solid #2c3642;
  position: absolute;
}

input[type=checkbox]:invalid ~ label.progress-task {
  color: #fff;
}

input[type=checkbox]:invalid ~ label.progress-task:before {
  border-color: #fdce7e;
}

input[type=checkbox]:invalid ~ label.progress-task:after {
  content: '...';
  color: #fdce7e;
  font: bold 14px/15px 'entypo', sans-serif;
  text-align: center;
}

input[type=checkbox]:invalid + label + input[type=checkbox]:invalid + label,
input[type=checkbox]:invalid + label + input[type=checkbox]:invalid + label:after {
  color: transparent;
}

input[type=checkbox]:invalid + label + input[type=checkbox]:invalid + label:before {
  border-color: #59616c;
}

input[type=checkbox]:checked + label:before {
  content: '\2713';
  color: #00D9d1;
  font: bold 14px/24px 'entypo', sans-serif;
  border-color: #00D9d1;
  text-align: center;
  background: #2c3642;
}

input[type=checkbox]:checked + label:after {
  display: none;
}

#progress-task1 + label:before {
  left: 190px;
  top: -20px;
}

#progress-task1 + label:after {
  left: 183px;
  top: -27px;
}

#progress-task2 + label:before {
  left: 354px;
  top: 75px;
}

#progress-task2 + label:after {
  left: 347px;
  top: 69px;
}

#progress-task3 + label:before {
  left: 354px;
  top: 290px;
}

#progress-task3 + label:after {
  left: 347px;
  top: 284px;
}

#progress-task4 + label:before {
  left: 190px;
  top: 385px;
}

#progress-task4 + label:after {
  left: 183px;
  top: 378px;
}

#progress-task5 + label:before {
  left: 14px;
  top: 290px;
}

#progress-task5 + label:after {
  left: 7px;
  top: 284px;
}

#progress-task6 + label:before {
  left: 14px;
  top: 75px;
}

#progress-task6 + label:after {
  left: 7px;
  top: 69px;
}

progress {
  position: absolute;
  top: 320px;
  left: 175px;
  width: 64px;
  height: 5px;
  appearance: none;
  -moz-appearance: none;
  -webkit-appearance: none;
  border: none;
  background-size: auto;
  color: #00D9d1;
  background: #59616c !important;
}

progress::-moz-progress-bar { 
    background: #00D9d1;	
}

progress::-webkit-progress-value {
    background: #00D9d1;
}

progress::-webkit-progress-bar {
    background: #59616c;
}

label.progress-tasks-completed {
  position: absolute;
  left: 0;
  width: 400px;
  font: 20px/455px sans-serif;
  text-align: center;
  color: #fdce7e;
}

label.progress-tasks-completed:before {
	position: absolute;
	top: 320px;
	left: 175px;
	background: -moz-linear-gradient(left, transparent 0, transparent 7px, #2c3642 8px, #2c3642 11px, transparent 11px, transparent 18px, #2c3642 19px, #2c3642 22px, transparent 22px, transparent 29px, #2c3642 30px, #2c3642 33px, transparent 33px, transparent 40px, #2c3642 41px, #2c3642 44px, transparent 44px, transparent 51px, #2c3642 52px, #2c3642 55px, transparent 55px, transparent 62px, #2c3642 63px, #2c3642 66px);
	background: -webkit-linear-gradient(left, transparent 0, transparent 7px, #2c3642 8px, #2c3642 11px, transparent 11px, transparent 18px, #2c3642 19px, #2c3642 22px, transparent 22px, transparent 29px, #2c3642 30px, #2c3642 33px, transparent 33px, transparent 40px, #2c3642 41px, #2c3642 44px, transparent 44px, transparent 51px, #2c3642 52px, #2c3642 55px, transparent 55px, transparent 62px, #2c3642 63px, #2c3642 66px);
	background: -o-linear-gradient(left, transparent 0, transparent 7px, #2c3642 8px, #2c3642 11px, transparent 11px, transparent 18px, #2c3642 19px, #2c3642 22px, transparent 22px, transparent 29px, #2c3642 30px, #2c3642 33px, transparent 33px, transparent 40px, #2c3642 41px, #2c3642 44px, transparent 44px, transparent 51px, #2c3642 52px, #2c3642 55px, transparent 55px, transparent 62px, #2c3642 63px, #2c3642 66px);
	background: -ms-linear-gradient(left, transparent 0, transparent 7px, #2c3642 8px, #2c3642 11px, transparent 11px, transparent 18px, #2c3642 19px, #2c3642 22px, transparent 22px, transparent 29px, #2c3642 30px, #2c3642 33px, transparent 33px, transparent 40px, #2c3642 41px, #2c3642 44px, transparent 44px, transparent 51px, #2c3642 52px, #2c3642 55px, transparent 55px, transparent 62px, #2c3642 63px, #2c3642 66px);
	background: linear-gradient(to right, transparent 0, transparent 7px, #2c3642 8px, #2c3642 11px, transparent 11px, transparent 18px, #2c3642 19px, #2c3642 22px, transparent 22px, transparent 29px, #2c3642 30px, #2c3642 33px, transparent 33px, transparent 40px, #2c3642 41px, #2c3642 44px, transparent 44px, transparent 51px, #2c3642 52px, #2c3642 55px, transparent 55px, transparent 62px, #2c3642 63px, #2c3642 66px);
	width: 64px;
	height: 5px;
	content: ' ';
	display: block;
	z-index: 1;
}

label.progress-tasks-completed sup {
  font-size: 12px;
}

.prog {
  position: relative;
  float: left;
  width: 400px;
  height: 400px;
  margin: -5px 0 0 -5px;
}

.prog > #slice {
  position: absolute;
  width: 410px;
  height: 410px;
  clip: rect(0,410px,410px,205px);
}

.prog > #slice.gt50 {
  clip: rect(auto, auto, auto, auto);
}

.prog > #slice > .pie {
  border: 5px solid #00D9d1;
  position: absolute;
  width: 400px;
  height: 400px;
  clip: rect(0,205px,410px,0);
  -moz-border-radius: 400px;
  -webkit-border-radius: 400px; 
  border-radius: 400px;
}

.prog > #slice > .pie.fill {
  -moz-transform: rotate(180deg) !important;
  -webkit-transform: rotate(180deg) !important;
  -o-transform: rotate(180deg) !important;
  transform: rotate(180deg) !important;
}
View Compiled
// JS updates <progress> element and .prog pie radius
var checkbox = document.getElementsByName('progress-tasks'),
	checkboxLen = checkbox.length,
	checkboxChecked = [],
	i,
	meter = document.getElementsByName('progress-tasks-percentage')[0],
	meterLabel = document.querySelector('.progress-tasks-completed'),
	meterCurrVal,
	progRadius = document.querySelector('.prog'),
	progRadiusPie,
	deg;

function updateProgressVal () {
  meterCurrVal = Math.floor((checkboxChecked.length / checkboxLen) * 100);	
  meter.setAttribute('value', meterCurrVal);
  meterLabel.getElementsByTagName('span')[0].innerHTML = meterCurrVal;

  progRadius.innerHTML = '<div class="percent"></div><div id="slice"' + (meterCurrVal > 50 ? ' class="gt50"' : '') + '><div class="pie"></div>' + (meterCurrVal > 50 ? '<div class="pie fill"></div>' : '') + '</div>';

  deg = (360 / 100) * meterCurrVal;
  progRadiusPie = document.querySelector('#slice .pie');
  progRadiusPie.style.mozTransform = 'rotate(' + deg + 'deg)';
  progRadiusPie.style.webkitTransform = 'rotate(' + deg + 'deg)';
  progRadiusPie.style.oTransform = 'rotate(' + deg + 'deg)';
  progRadiusPie.style.msTransform = 'rotate(' + deg + 'deg)';
  progRadiusPie.style.transform = 'rotate(' + deg + 'deg)';
}

for (i = 0; i < checkboxLen; i++) {
  if (checkbox[i].checked) {
     checkboxChecked.push(checkbox[i]);
  }

  checkbox[i].onchange = function () {
	(this.checked) ? checkboxChecked.push(this) : checkboxChecked.splice(checkboxChecked.indexOf(this), 1);	
	updateProgressVal();  
  }
}

updateProgressVal();

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js