Methodology
Measurement and reference conventions
This page explains how to read Fitwise dimensions and where internal reference values differ from product measurements or published standards.
Measurement types
- Exact
- A value transcribed from the cited source or exact model documentation.
- Nominal
- A marketed or conventional size label. It may not equal the item's outside dimensions.
- Typical
- A representative example, not a guarantee for every model or configuration.
- Recommended
- A sourced recommendation or an explicitly labeled Fitwise planning target. Check the accompanying note to distinguish them.
- Derived
- A calculation from named source dimensions or a stated geometric formula.
Internal reference values
Some examples use round-number reference dimensions or comfort targets when no single external standard applies. These are Fitwise modeling conventions, not product specifications, laws, building-code values or universal ergonomic minimums. When the UI asks for a user-selected clearance, the result uses that input and does not claim it is a standard.
Units, precision and rounding
Geometry is calculated internally in millimetres. Inputs may use mm, cm, m, inches or feet; visible dimensions pass through the shared measurement formatter. Rounding is for display only and does not change intermediate geometry. Screen-panel dimensions derived from diagonal and aspect ratio are estimates rounded to the nearest millimetre and are not overall device widths.
How to interpret results
“Physical margin” is available space minus the hard footprint. “Target margin” is available space minus the selected or sourced recommended envelope. A positive physical margin does not mean a clearance target is met; compare both columns. Planning permission, installation requirements, structural suitability and safety are not evaluated unless a tool explicitly says otherwise—and no generic local regulation is inferred.