Question 1

Ranking or one number: which radial chart do I need?

Accepted Answer

To rank a few categories, the Radial Chart gives each browser a ring as long as its count; the Labels version writes the names on the rings, and the Grid version draws circles and spokes instead of tracks. For one number, the Radial Chart with Text is a thin ring with rounded ends and the count in the middle, and the Custom Shape version a thicker one with square ends. The Stacked Radial Chart splits a half ring between desktop and mobile and prints their sum.

Question 2

How long does each ring get?

Accepted Answer

In the Radial Chart, the angle scale runs from 0 to `maxVisitors`, the largest count, so Chrome makes a full turn and the others a part of it. The Text and Custom Shape versions use a bare `scaleLinear`, so their single value always fills the sweep `endAngle` sets. To show progress toward a target instead, put that target in the angle scale's domain rather than letting it fit the value.

Question 3

What draws the count in the middle of the ring?

Accepted Answer

Two `radialText` marks at `radius: () => 0` in a `decorative()` `polar()` layer: the count in bold `var(--foreground)`, and Visitors under it in `var(--muted-foreground)`. The Text and Custom Shape versions read the count from `chartData[0].visitors.toLocaleString()`, and the Stacked Radial Chart from `totalVisitors`, the sum of its one row. Both are worked out once in the script, so if the row comes in as a prop, make the total a `$derived`.

Question 4

How do I turn a full ring into a half ring?

Accepted Answer

Set `polar()`'s `startAngle` and `endAngle`. Each file has a `rechartsAngle()` helper that turns Recharts' degrees into TanStack's radians, so the Stacked Radial Chart's half ring runs from `rechartsAngle(0)` to `rechartsAngle(180)`. The Text version stops at 250 degrees and the Custom Shape version at 100, with the center text left where it is.

Question 5

How do I size and round the rings?

Accepted Answer

`cornerRadius` on `radialBarAngle` rounds the ends: 10 in the Text version, 5 in the stacked one, none in Custom Shape. The radius scale's `range` sets the thickness in pixels, `[80, 90]` for the thin ring and `[65, 95]` for the thick one, and the track behind is `var(--muted)`. `ChartContainer`'s `class="mx-auto aspect-square max-h-[250px]"` keeps the card square, so the ring stays round at any width.

Question 6

Do the radial charts need runes or props?

Accepted Answer

No: all six are static, with `chartData`, `chartConfig` and `definition` as constants in `<script lang="ts">`. To drive a progress ring from a number, add `let { value } = $props()`, build the row from it, and wrap the row and the `defineChart(...)` call in `$derived`, so the ring redraws when the parent passes a new value.

Question 7

Can I show several rings on one SvelteKit page?

Accepted Answer

Yes. Each `ChartContainer` takes a unique id from Svelte's `$props.id()`, writes its `--color-` variables on its own `

` and scopes any `theme` colors to its `data-chart` attribute, so one ring's config never leaks into the next. Render the component once per value and lay the cards out in a grid.

Question 8

How do I make the ring's number readable to screen readers?

Accepted Answer

`ariaLabel` names the chart by its card title, but the count in the middle is SVG text. Pass it in `ChartContainer`'s `ariaDescription` prop as well, or keep it in the card's description, so it doesn't depend on reading the graphic.

Question 9

How do I install a chart?

Accepted Answer

Signed in, copy the chart's command: `npx shadcn-svelte@latest add` with its URL. It adds the chart to `components/charts`, the `tanstack-chart` kit to your ui folder, and `@tanstack/charts`. Import the chart and render it.

Question 10

Are the charts free?

Accepted Answer

Yes. Every chart is free to use in personal and commercial projects. Seeing the code and installing it takes a free account, one tap with Google or GitHub. Pro is the site's paid plan for blocks, the Pro collections and the MCP; you don't need it for charts.

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Progress rings for Svelte 5 apps.

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Frequently asked questions

Ranking or one number: which radial chart do I need?

How long does each ring get?

What draws the count in the middle of the ring?

How do I turn a full ring into a half ring?

How do I size and round the rings?

Do the radial charts need runes or props?

Can I show several rings on one SvelteKit page?

How do I make the ring's number readable to screen readers?

How do I install a chart?

Are the charts free?

Your numbers, in rings.