Inputs
Results
Enter dimensions then click Calculate.
NAIBC / IRC codes
References & Sources
Standards Cited
- SI Brochure (9th edition) — The International System of Units
Defines the metre as the SI base unit of length, from which square metre (m²) is derived as the SI unit of area View → - NIST Handbook 44 — Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices
Provides authoritative conversion factors between imperial and metric area units (e.g., 1 ft² = 0.092903 m²) View → - ANSI Z765 — ANSI Z765 — Square Footage — Method for Calculating
Standard method for calculating residential floor area in North America - ASTM E1527 — ASTM E1527 — Standard Practice for Environmental Site Assessments
References standard area measurement practices used in North American property assessments
Formulas Used
- Rectangle Area:
A = length x width
Source: Standard geometry - Triangle Area:
A = 0.5 x base x height
Source: Standard geometry - Circle Area:
A = pi x r²
Source: Standard geometry - Trapezoid Area:
A = 0.5 x (a + b) x h
Source: Standard geometry - Sector Area:
A = (angle / 360) x pi x r²
Source: Standard geometry - Wastage Allowance:
Total = Area x (1 + wastage% / 100)
Source: Industry standard practice — Default 10% wastage for flooring/packaging - Area Unit Conversion:
result = value x (fromFactor / toFactor)
Source: NIST Handbook 44 — Conversion via square metres as the intermediate base unit
Key Assumptions
- 1 ft² = 0.092903 m² (exact NIST conversion factor) — NIST Handbook 44
- 1 acre = 43,560 ft² = 4046.86 m² — NIST Handbook 44
- Default wastage of 10% is applied for flooring pack calculations — Industry standard practice