Percent pie chart with css only

Question

I've found pretty nice "percent pie chart" and want to create it with CSS only. No animation is required. Just static "picture".

Example 1

I understand If I wanna create this kind of chart I need to use elements like these

Example 2

The questions are

How to create element #2 ?
How to manage shape of element #2 for smaller (5%) or higher percent (80%) values ?

user_8620333 · Answer

New answer 2021

With some modern techniques we can improve the code. You can have rounded edges and also consider animation:

@property --p{
  syntax: '';
  inherits: true;
  initial-value: 1;
}

.pie {
  --p:20;      /* the percentage */
  --b:22px;    /* the thickness */
  --c:darkred; /* the color */
  --w:150px;   /* the size*/
  
  width:var(--w);
  aspect-ratio:1/1;
  position:relative;
  display:inline-grid;
  margin:5px;
  place-content:center;
  font-size:25px;
  font-weight:bold;
  font-family:sans-serif;
}
.pie:before,
.pie:after {
  content:"";
  position:absolute;
  border-radius:50%;
}
.pie:before {
  inset:0;
  background:
    radial-gradient(farthest-side,var(--c) 98%,#0000) top/var(--b) var(--b) no-repeat,
    conic-gradient(var(--c) calc(var(--p)*1%),#0000 0);
  -webkit-mask:radial-gradient(farthest-side,#0000 calc(99% - var(--b)),#000 calc(100% - var(--b)));
          mask:radial-gradient(farthest-side,#0000 calc(99% - var(--b)),#000 calc(100% - var(--b)));
}
.pie:after {
  inset:calc(50% - var(--b)/2);
  background:var(--c);
  transform:rotate(calc(var(--p)*3.6deg - 90deg)) translate(calc(var(--w)/2 - 50%));
}
.animate {
  animation:p 1s .5s both;
}
.no-round:before {
  background-size:0 0,auto;
}
.no-round:after {
  content:none;
}
@keyframes p{
  from{--p:0;}
}

body {
  background:#ddd;
}

 20%
 40%
 60%
 80%
 90%

Old answer

You can do this with multiple background.

From 0% to 50%:

.box {
  width: 100px;
  height: 100px;
  display: inline-block;
  border-radius: 50%;
  padding: 5px;
  background: 
    linear-gradient(#ccc, #ccc) content-box, 
    linear-gradient(var(--v), #f2f2f2 50%, transparent 0),
    linear-gradient(to right, #f2f2f2 50%, blue 0);
}








The formula is [p = (18/5) * x - 90]. Where x is the percentage and p the degree
for x = 5% --> p = -72deg

From 50% to 100%:

.box {
  width:100px;
  height:100px;
  display:inline-block;
  border-radius:50%;
  padding:5px;
  background:
    linear-gradient(#ccc,#ccc) content-box,
    linear-gradient(var(--v), blue 50%,transparent 0),
    linear-gradient(to right, #f2f2f2 50%,blue 0);
}








The formula is [p = (18/5) * x - 270]. Where x is the percentage and p the degree
for x = 80% --> p = 18deg

You can combine both like this:

.box {
  width:100px;
  height:100px;
  display:inline-block;
  border-radius:50%;
  padding:5px;
  background:
    linear-gradient(#ccc,#ccc) content-box,
    linear-gradient(var(--v), #f2f2f2 50%,transparent 0) 0/calc(var(--s)*100%)      ,
    linear-gradient(var(--v), blue    50%,transparent 0) 0/calc((1 - var(--s))*100%),
    linear-gradient(to right, #f2f2f2 50%,blue 0);
}

Now we can optimize like below to consider percetange value:

.box {
  
  --v:calc( ((18/5) * var(--p) - 90)*1deg);

  width:100px;
  height:100px;
  display:inline-block;
  border-radius:50%;
  padding:10px;
  background:
    linear-gradient(#ccc,#ccc) content-box,
    linear-gradient(var(--v), #f2f2f2     50%,transparent 0) 0/min(100%,(50 - var(--p))*100%),
    linear-gradient(var(--v), transparent 50%,blue        0) 0/min(100%,(var(--p) - 50)*100%),
    linear-gradient(to right, #f2f2f2 50%,blue 0);
}

Related question to get another version: Creating a static pie chart with CSS

We can also consider mask to add transparency:

.box {
  
  --v:calc( ((18/5) * var(--p) - 90)*1deg);

  width:100px;
  height:100px;
  display:inline-block;
  border-radius:50%;
  padding:10px;
  background:
    linear-gradient(var(--v), #f2f2f2     50%,transparent 0) 0/min(100%,(50 - var(--p))*100%),
    linear-gradient(var(--v), transparent 50%,blue        0) 0/min(100%,(var(--p) - 50)*100%),
    linear-gradient(to right, #f2f2f2 50%,blue 0);
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite:destination-out;
  mask-composite:exclude;
}

body {
  background:linear-gradient(to right,red,yellow);
}

Also like below:

.box {
  
  --v:calc( ((18/5) * var(--p) - 90)*1deg);

  width:100px;
  height:100px;
  display:inline-block;
  border-radius:50%;
  padding:10px;
  background:
    linear-gradient(var(--v), transparent 50%,blue        0) 0/min(100%,(var(--p) - 50)*100%),
    linear-gradient(to right, transparent 50%,blue 0);
  -webkit-mask:
    linear-gradient(var(--v), #f2f2f2     50%,transparent 0) 0/min(100%,(50 - var(--p))*100%),
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite:destination-out;
  mask-composite:exclude;
}

body {
  background:linear-gradient(to right,red,yellow);
}

Related: Border Gradient with Border Radius

user_2802040 · Answer

Using the new conic gradient, this can be managed with a single div which just landed in Chrome as an experimental property.

Image of Result

:root {
  --size: 100px;
  --bord: 10px;
}

.chart {
  width: var(--size);
  height: var(--size);
  margin: 1em auto;
  border-radius: 50%;
  background-image: conic-gradient(lightseagreen var(--value), lightgrey var(--value));
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.chart::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: calc(100% - var(--bord));
  height: calc(100% - var(--bord));
  background: white;
  border-radius: inherit;
}

p {
  position: relative;
  z-index: 1;
  font-size: 2em;
}

.x-60 {
  --value: 60%;
}

.x-20 {
  --value: 20%;
}

With thanks for Temani Afif it's possible to achieve this without the pseudo element using a border and leveraging background-clip...

 background: 
    linear-gradient(white,white) padding-box,
    conic-gradient(lightseagreen var(--value), lightgrey var(--value)) border-box;

:root {
  --size: 100px;
  --bord: 10px;
}

.chart {
  width: var(--size);
  height: var(--size);
  margin: 1em auto;
  border: var(--bord) solid transparent;
  border-radius: 50%;
  background: linear-gradient(white, white) padding-box, conic-gradient(lightseagreen var(--value), lightgrey var(--value)) border-box;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 2em;
}

.x-60 {
  --value: 60%;
}

.x-20 {
  --value: 20%;
}

user_4809152 · Answer

Hey gus you can add small CSS styles

.circle {
  position: relative;
  top: 5px;
  left: 5px;
  text-align: center;
  width: 100px;
  height: 100px;
  border-radius: 100%;
  background-color: #ffffff;
}

.circle-border {
  position: relative;
  text-align: center;
  width: 110px;
  height: 110px;
  margin-left: 30%;
  border-radius: 100%;
  background-color: #E53B3B;
  background: linear-gradient(0deg, lightgray 100%, black 0%)
}

HTML

aaa

JS : display the % of filling automatically

// let i = 75;
//   let deg=Math.round(1.8*i); 
//   let completed=0;
//   let remaining=100-i;
//   // completed = (remaining>50)? 50 : completed;
// let backgroundStlye = 'linear-gradient('+deg+'deg, lightgray '+remaining +'%, black '+completed + '%)';
//   setTimeout(function(){
//     console.log(backgroundStlye);
//   document.getElementById("circleElement").style.background =backgroundStlye;
// },i*100);

for(let i=1;i<=100;i++){
  let deg=Math.round(1.8*i); 
  let completed=i;
  let remaining=100-i;
  completed = (remaining<50)? 0 : completed;
let backgroundStlye = 'linear-gradient('+deg+'deg, lightgray '+remaining +'%, black '+completed + '%)';
  setTimeout(function(){
    console.log(backgroundStlye);
  document.getElementById("circleElement").style.background =backgroundStlye;
    document.getElementById("circleElementValue").innerHTML = i+'%';
},i*100);
}

I created sample https://codepen.io/arun-b-shet/pen/mdVVWXo

HOPE you enjoyyyyyyyyyyyy

Percent pie chart with css only

3 Answers