Feet-Squared to Meters-Squared

Purpose & User Intent: This tool solves the problem of converting area from square feet to square meters. It serves engineers, architects, builders, facility managers, students, and DIY homeowners during floor planning, material estimation, and compliance checks. Example: 200 ft² ≈ 18.5806 m².
Core Logic & Features: Required: a single numeric input in ft² (non-negative) and a deterministic m² output. Validation rejects non-numeric or negative values. The exact factor is 0.09290304. Optional/advanced: interpret units with suffixes (ft², m²), configurable decimal precision, and bulk conversions via JSON for API use.
Inputs & Outputs: Inputs: ft2 (number, non-negative, sample 200). Outputs: m2 (number, 0.09290304 × ft2), formatted to six decimals by default. Precision can be adjusted. Example: 200 ft² → 18.580608 m².
Algorithms & Calculations: Applies the exact conversion constant, multiplies input by 0.09290304. Rounding is controlled by the requested precision. For batch mode, apply the same factor to each value in the input array and return an array of m² values.
Error & Edge Cases: Negative values are invalid. Non-numeric or infinite inputs trigger validation errors. Very large values may exceed typical number precision in some environments. If optional unit suffixes are provided, parsing must identify ft² vs m²; otherwise default to ft².
Industry/Region & Localization: Uses SI units for outputs (m²). Decimal separators follow locale-independent format (period). Primarily aligned with US customary area to metric conversions; no currency handling.
Assumptions & Exclusions: Only ft² to m² conversions are supported here; length or volume conversions are out of scope. The tool does not perform rounding beyond the requested precision unless specified in advanced mode.