---
url: >-
  https://adk.nht.io/api/@nhtio/adk/batteries/tools/unit_conversion/variables/convertUnitTool.md
description: Convert a numeric value between units of the same physical category.
---

# Variable: convertUnitTool

```ts
const convertUnitTool: Tool<SpooledArtifact>;
```

Defined in: [batteries/tools/unit\_conversion/index.ts:138](https://github.com/NHTIO/ADK/blob/v1.20260605.0/src/batteries/tools/unit_conversion/index.ts#L138)

Convert a numeric value between units of the same physical category.

## Remarks

Supported categories: length, mass, volume, temperature, speed, area, data, time, energy,
pressure, angle. Uses static conversion tables — no external data required. Temperature is
handled specially via a Kelvin intermediate to preserve precision across `C`/`F`/`K`.