# Cabinet Variant Sheet

> Compare up to 25 width/height combinations on one measured concept sheet. Compare open-shelf dimensions, clear shelf spacing and panel area, then export an editable native Kerfwise project and generated part dimensions.

Part of usefulweb.app (https://usefulweb.app/). Part of [Kerfwise](https://kerfwise.usefulweb.app/) (ownerApp: kerfwise). Results are deterministic calculations from the inputs and the listed assumptions; the API returns exactly what the web page shows.

## Use it
- Human interface: https://kerfwisevariantsheet.usefulweb.app/ (interactive tool at https://kerfwisevariantsheet.usefulweb.app/tool)
- JSON API: POST https://kerfwisevariantsheet.usefulweb.app/api/v1/calculate with a JSON object of inputs (schema: https://kerfwisevariantsheet.usefulweb.app/api/v1/tool)
- OpenAPI: https://kerfwisevariantsheet.usefulweb.app/openapi.json
- MCP (Streamable HTTP): https://kerfwisevariantsheet.usefulweb.app/mcp - tool `kerfwise_variant_sheet`

## Inputs
- widths (textarea): Widths in mm, separated by commas
- heights (textarea): Heights in mm, separated by commas
- depth (number): Depth (mm)
- thickness (number): Panel thickness (mm)
- shelves (number): Whole shelf count
- selected (number): Selected variant number

## Method
- At most five widths × five heights, common display scale, user-specified depth and thickness. Panel area and clear shelf spacing are geometric estimates.
- The selected valid variant is built through the real Kerfwise cabinet engine. The native project has a custom zero-price material, no back, no doors or edging, and butt-joint settings.
- Open the exported .kerfwise.json in Kerfwise to inspect construction, material prices, fixings, loads and anti-tip requirements before manufacture. This tool does not establish structural adequacy.