Sources and Methodology

Conversion Factor

The conversion factor 1 m2 = 10.76391041671 ft2 is derived from the internationally agreed definition of the foot, established in the International Yard and Pound Agreement of 1959 (US National Bureau of Standards, Federal Register 24, 5348, 1959).

Per that agreement: 1 foot = 0.3048 metres exactly. Therefore 1 metre = 1/0.3048 = 3.28083989501312... feet. Squaring: 1 m2 = (1/0.3048)^2 = 10.7639104167097... ft2.

References: NIST Special Publication 811 (2008), Guide for the Use of the International System of Units (SI). ISO 80000-3:2019 (Quantities and units - Space and time).

Property Size Data

• UK home sizes by type: RICS Residential Property Standards (2022), LABC (Local Authority Building Control) research, Savills UK Residential Research (2023).
• UK sizes by era: RIBA (Royal Institute of British Architects) Space Standards report (2011, updated benchmarks 2023), Knight Frank Research.
• Regional variation: ONS (Office for National Statistics) English Housing Survey 2022-23 data tables.
• London minimums: Greater London Authority Housing SPG (Supplementary Planning Guidance) 2023, Mayor of London Housing Design Standards.
• International comparisons: Eurostat Statistics on Housing 2023, US Census Bureau American Housing Survey 2021.

Apartment Size Data (Global)

City apartment sizes are median estimates for centrally-located private rental stock as of 2025-2026, drawn from:

• CBRE Global Real Estate Markets Research (2024)
• JLL City Research (2024 market reports for London, New York, Tokyo, Sydney)
• Savills World Research (2024)
• Local real estate portals: Rightmove (UK), Zoopla (UK), Idealista (Spain), SeLoger (France), SUUMO (Japan), Domain (Australia)

Commercial Space Benchmarks

• BCO (British Council for Offices) Guide 2023: Occupier Density
• Gensler Workplace Survey 2024
• CBRE Office Occupancy Report (UK) 2024
• Savills Commercial Property UK Market Survey 2024
• CoStar UK Retail Research 2024

Real-World Scale References

Sports and venue dimensions used for contextual comparisons:

• Tennis court dimensions: ITF Rules of Tennis 2024 (singles: 23.77m x 8.23m = 195.64 m2; doubles: 23.77m x 10.97m = 260.75 m2)
• NBA court: NBA Official Rules (28.65m x 15.24m = 436.63 m2)
• Olympic swimming pool: FINA Technical Open Water Swimming Rules (50m x 25m = 1,250 m2 pool, plus deck area)
• Football pitch: FIFA Laws of the Game 2024 (permitted range: 100-110m x 64-75m; standard 105m x 68m = 7,140 m2)

Methodology Note

All conversions on this site use the full precision factor 10.76391041671. Results are rounded to 2 decimal places for display on the converter and per-number pages, and to 4 decimal places where greater precision is shown. Property size benchmarks are approximate median figures and may vary significantly by specific location, property age, and market conditions. This site is a free utility and is not affiliated with any real estate portal, standards body, or measurement authority.