Parcel area converter and screening check

Number style for results

1. Convert an area

Area Unit

Result	Value
Acres	-
Hectares	-
Square feet	-
Square metres	-

2. Stated area against polygon area

Stated (attribute) area Unit Polygon area, from a projected CRS Unit Your tolerance (%), your own choice

Result	Value
Stated minus polygon (acres)	-
Stated against polygon	-
Against your tolerance	-

3. Screen one parcel

Polygon acres Stated acres (optional) Constrained share (%) Mean slope (%) Your minimum net acres Your slope limit (%)

Result	Value
Net acres, polygon basis	-
Size test, polygon basis	-
Slope test	-
Net acres, stated basis	-
Size test, stated basis	-
Do the two bases agree?	-

Acre is the international acre: 43,560 square feet, with 1 foot = 0.3048 m exactly (4,046.8564224 square metres). The US survey acre differs by about 4 parts per million, which is negligible here. Numbers accept 1,234.5, 1.234,5, 1234,5 or 1234.5. A lone comma or point followed by exactly three digits (10,000 or 1.000) is refused as ambiguous, so write 10000 or 1.0. Use both marks (1,234.5 or 1.234,5) for thousands with decimals. Part 3 uses placeholder limits you set yourself: no universal minimum or slope limit exists. A screening aid, not a survey or a legal area.