Conversion method
Area factors are squared length factors. A square foot is 0.09290304 m² exactly; an acre is 43,560 square feet. Do not use a linear feet-to-meters factor for floor area.
m² = x × 0.09290304
10 ft² = 0.92903 m².
| ft² | m² |
|---|---|
| 1 | 0.092903 |
| 5 | 0.464515 |
| 10 | 0.92903 |
| 25 | 2.322576 |
| 50 | 4.645152 |
| 100 | 9.290304 |
Unit definitions and sources
Convert area through the shared base unit.
14 of the 24 definitions below were checked against the cited sources on 2026-09-20 (AI-assisted check).
| Unit and system | Use | Definition | Relationship |
|---|---|---|---|
| Square meter (m²); si | Common units | Square meter measures area. m2 = (value in m²) × 1. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Hectare (ha); si | Common units | Hectare measures area. m2 = (value in ha) × 10000. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Square kilometer (km²); si | Common units | Square kilometer measures area. m2 = (value in km²) × 1000000. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Square foot (ft²); us | Common units | Square foot measures area. m2 = (value in ft²) × 0.09290304. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Square yard (yd²); us | Common units | Square yard measures area. m2 = (value in yd²) × 0.83612736. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Acre (ac); us | Common units | Acre measures area. m2 = (value in ac) × 4046.8564224. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Square mile (mi²); us | Common units | Square mile measures area. m2 = (value in mi²) × 2589988.110336. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Square millimeter (mm²); si | Specialist units | Square millimeter measures area. m2 = (value in mm²) × 0.000001. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Square centimeter (cm²); si | Specialist units | Square centimeter measures area. m2 = (value in cm²) × 0.0001. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Square inch (in²); us | Specialist units | Square inch measures area. m2 = (value in in²) × 0.00064516. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Are (a); metric | Specialist units | An are is exactly 100 square meters, or one hundredth of a hectare. Common use: Land area. | Exact definition; numerical display may be rounded |
| Square exameter (Em²); si | Specialist units | Square exameter: E denotes 10^18; the entire prefix is raised to power 2 gives 1e+36 m2. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Square petameter (Pm²); si | Specialist units | Square petameter: P denotes 10^15; the entire prefix is raised to power 2 gives 1e+30 m2. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Square terameter (Tm²); si | Specialist units | Square terameter: T denotes 10^12; the entire prefix is raised to power 2 gives 1e+24 m2. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Square gigameter (Gm²); si | Specialist units | Square gigameter: G denotes 10^9; the entire prefix is raised to power 2 gives 1000000000000000000 m2. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Square megameter (Mm²); si | Specialist units | Square megameter: M denotes 10^6; the entire prefix is raised to power 2 gives 1000000000000 m2. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Square hectometer (hm²); si | Specialist units | Square hectometer: h denotes 10^2; the entire prefix is raised to power 2 gives 10000 m2. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Square decameter (dam²); si | Specialist units | Square decameter: da denotes 10^1; the entire prefix is raised to power 2 gives 100 m2. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Square decimeter (dm²); si | Specialist units | Square decimeter: d denotes 10^-1; the entire prefix is raised to power 2 gives 0.01 m2. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Square micrometer (µm²); si | Specialist units | Square micrometer: µ denotes 10^-6; the entire prefix is raised to power 2 gives 1e-12 m2. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Square nanometer (nm²); si | Specialist units | Square nanometer: n denotes 10^-9; the entire prefix is raised to power 2 gives 1e-18 m2. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Square picometer (pm²); si | Specialist units | Square picometer: p denotes 10^-12; the entire prefix is raised to power 2 gives 1e-24 m2. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Square femtometer (fm²); si | Specialist units | Square femtometer: f denotes 10^-15; the entire prefix is raised to power 2 gives 1e-30 m2. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
| Square attometer (am²); si | Specialist units | Square attometer: a denotes 10^-18; the entire prefix is raised to power 2 gives 1e-36 m2. Common use: Floor and land area. | Exact definition; numerical display may be rounded |
Sources: BIPM: International System of Units; NIST: SP 811 Appendix B.8: conversion factors; BIPM: SI prefixes
Precision of area conversions
All 24 area units convert through Square meter (m²). 24 have an exact defined relationship to the base unit and 0 are conventional or measured values. Results and the tables on this page come from the same engine, so a table value can be checked against the converter directly.
Standard display shows up to six decimal places, switching to scientific notation for very large or small values. Calculation uses JavaScript binary floating point independently of display rounding, so extra digits are not a claim about measurement accuracy. Each unit lists its own source; a citation records where the definition comes from, not an independent review. See Conversion methodology for the review and correction process.