# ProgressRing (/docs/charts/progress-ring)

ProgressRing answers "how complete is this?" at icon size, where a linear bar doesn't fit. The start angle is fixed at
12 o'clock and the caps are butt-cut — the two quiet ways rings inflate progress, both removed. It is never a gauge: no
needle, no red zone.

```tsx
import { ProgressRing } from "@microcharts/react/progress-ring";

<ProgressRing value={0.68} label="percent" size={48} title="Backup" />
```

## Install

```tsx
import { ProgressRing } from "@microcharts/react/progress-ring";

<ProgressRing value={0.68} title="Backup" />
```

Setup (package + stylesheet): [Quickstart](/docs/quickstart#set-up-with-an-ai-agent) or paste [`/agent-setup.md`](/agent-setup.md) into your agent.


## When to use it

- **Good for** — tab headers, KPI card corners, cooldowns and retry timers (`sweep`).
- **Avoid for** — precise reads (Progress — the % label is the datum there).


## Variants

```tsx
// the REMAINING wedge shrinks — cooldown semantics
<ProgressRing value={0.68} sweep />
```

```tsx
<ProgressRing value={0.68} weight={6} />
```

```tsx
<ProgressRing value={0.68} label="percent" locale="de-DE" />
```

## Edge cases

```tsx
<ProgressRing value={1.4} label="percent" title="Over budget" />
```

```tsx
<ProgressRing value={NaN} label="percent" title="Unknown" />
```


## Why this default

Butt caps and a fixed start: rounded caps overstate small fractions, and variable start angles make identical fractions
look different. Past 100% the ring clamps while the center label carries the true percent — same contract as Progress. A
full circle is drawn as two half-arcs (SVG cannot draw a single 360° arc).

## Accessibility

The accessible name reuses the progress wording — **"68% complete."**, or **"32% remaining."** in sweep mode. The
interactive entry announces only at 25/50/75/100% threshold crossings — a streaming value never spams the screen reader.

This chart is a single unit, so there is nothing to rove between: a click, tap, `Enter` or `Space` selects it
and fires `onSelect`, and no selection stays pinned. That is the scalar half of the shared
[interaction contract](/docs/accessibility#one-interaction-contract).

## Props

| Prop | Type | Description |
| --- | --- | --- |
| `value` (required) | `number` | The progressed amount. |
| `max` | `number` | Denominator (default 1). |
| `sweep` | `boolean` | Countdown: the REMAINING wedge shrinks. |
| `weight` | `number` | Ring thickness (viewBox units). |
| `label` | `"none" \| "percent"` | Centered figure (≥ 20 px rendered). |
| `animate` | `boolean` | (interactive) Opt-in entrance motion when the chart mounts client-side — add `import "@microcharts/react/motion"` once. Inert on the server, on hydrated server HTML, and under `prefers-reduced-motion`. |

Plus the shared grammar — `data`, `domain`, `color`, `title`, `summary`, `format` — and the layout props (`width`, `height`, `className`, `style`) that every chart accepts. Interactive entries also share `animate` and `live`, and — wherever a chart has more than one navigable unit — `onActive`, `onSelect`, `selectedIndex` and `defaultSelectedIndex`; and — wherever the chart shows a hover value — `readout`. See [the shared grammar](/docs/quickstart#the-shared-grammar).