Home, building & household
Calculation method and formula
Living rooms [m²] + Eligible ancillary areas [m²] + Balcony/terrace area [m²] × Eligible share [%] ÷ 100
Understand the inputs
- Living rooms
- Unit: m². Use a measured value or your own assumption.
- Eligible ancillary areas
- Unit: m². Use a measured value or your own assumption.
- Balcony/terrace area
- Unit: m². Use a measured value or your own assumption.
- Eligible share
- Unit: %. Use a measured value or your own assumption.
Assumptions and limitations
Eligible room and ancillary areas are added, with balcony area weighted by your percentage. This does not replace measurement under a country's living-area rules.
The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation.