Area Converter
Convert square feet, square meters, acres, hectares, square miles, and other area units. Includes a room area calculator, formulas, and land-size references.
Quick Reference - Popular Conversions
| From | To | Multiply By | Example |
|---|---|---|---|
| Square Feet | Square Meters | 0.092903 | 1000 ft² = 92.9 m² |
| Square Meters | Square Feet | 10.7639 | 100 m² = 1,076.4 ft² |
| Acres | Hectares | 0.404686 | 5 ac = 2.02 ha |
| Hectares | Acres | 2.47105 | 2 ha = 4.94 ac |
| Square Miles | Square Kilometers | 2.58999 | 1 mi² = 2.59 km² |
| Acres | Square Feet | 43,560 | 1 ac = 43,560 ft² |
| Hectares | Square Meters | 10,000 | 1 ha = 10,000 m² |
| Square Yards | Square Meters | 0.836127 | 100 yd² = 83.6 m² |
Mental Math Shortcuts
- 1 m² ≈ 10.76 ft² (round to 11)
- 1 ft² ≈ 0.093 m² (about 1/11 m²)
- 1 acre ≈ 4,000 m² (exact: 4,047)
- 1 hectare ≈ 2.5 acres (exact: 2.471)
- 10 ft² ≈ 1 m² (ballpark)
- 100 m² ≈ 1,000 ft² (ballpark)
How to Use This Converter
Use single conversion for one unit pair, convert to all units for a full comparison table, or use the room calculator to calculate area from dimensions. The calculator supports common real estate, construction, land, survey, metric, and imperial area units.
Metric Area Units
The square meter is the base. Hectare (10,000 m²) handles farms and land. Square kilometer covers cities and regions.
Imperial Area Units
US real estate runs on square feet, land parcels on acres (43,560 ft² each), regions on square miles (640 acres). The acre's odd number comes from ox plowing distances. Square yards show up for carpet. UK and Canada use these too.
Acres or Hectares?
- Acres: United States
- Hectares: Europe, Asia, Africa, South America, Australia
- Both: UK, rural Canada
1 hectare = 2.47 acres—multiply hectares by 2.5 for a quick estimate, or acres by 0.4. An acre covers 90% of a football field; a hectare is 100m × 100m.
Watch Out For: The Square Factor
Feet to meters is 0.3048, but square feet to square meters is 0.3048² = 0.0929. A 10×10 ft room (100 ft²) = 3.048×3.048 m = 9.29 m², not 30.48 m². Using the wrong factor triples your error. Volume conversions cube the factor.
How Square Footage Gets Measured
US listings quote gross living area to exterior walls, excluding garages. European listings use usable floor space—smaller numbers for identical homes. Average sizes: USA ~2,300 ft², Australia ~2,000 ft², UK ~820 ft², Hong Kong under 500 ft².
US Land Survey System
The 1785 grid divided land west of the original colonies into townships (6 mi × 6 mi, containing 36 sections). One section = 1 square mile = 640 acres. Rural deeds use descriptions like "NW quarter of Section 12, Township 3 North, Range 2 West."
International Area Units
Dunam (Middle East): 1,000 m². Bigha (India): 1,500-6,000+ m² depending on state. Mu (China): 667 m². Rai (Thailand): 1,600 m². Tatami (Japan): 1.65 m², used for room sizes. Pyeong (Korea/Taiwan): 3.3 m². Bigha in Bihar differs from West Bengal—verify local definitions.
Area Formulas
For irregular shapes, break them into rectangles and triangles and add up the pieces.
Quick Math
- ft² to m²: × 0.093
- acres to hectares: × 0.4
- hectares to acres: × 2.5
For legal docs, use exact factors—the 0.4 vs 0.404686 difference means a 100-acre farm is 40.47 hectares, not 40.
When to Use Area Instead of Length
Area measures surface, not distance. A room that is 10 feet by 12 feet is 120 square feet because both dimensions matter. If only one side or distance needs conversion, use the length converter first. If the measurement includes depth or height as a third dimension, use the volume converter instead.
Real Estate and Room Planning
Square feet and square meters are the most common home and apartment area units. Listing standards can vary by country and by property type, so a converted number should be treated as a measurement conversion, not a guarantee that two listings were measured under the same rules.
Land, Agriculture, and Survey Work
Acres and hectares are used for land parcels, farms, parks, and large outdoor spaces. Hectares are common internationally, while acres are common in the United States. For legal deeds, zoning, and survey documents, exact conversion factors matter more than rounded mental estimates.
Quick Answers
Using Area Converter for one defined quantity
Area Converter compares several surface area units without changing the underlying measured quantity. Use one source value from one parcel, floor, wall, roof plane, component face, or mapped region with a defined boundary.
This broader hub is useful for property records, floor plans, material coverage, maps, and surface specifications. Within Area Converter, select the actual source and destination labels before interpreting the numerical difference; a familiar abbreviation is not evidence that the correct unit was selected.
Within Area Converter, the converter performs arithmetic from the entered value and selected units. Within Area Converter, it does not measure the source, identify its standard, inspect its context, or decide how much precision the destination record supports.
Source records for surface area
Confirm that the source is an area rather than a pair of linear dimensions. State whether openings, overlaps, slopes, or repeated surfaces are already included.
Write the source number and unit together before opening Area Converter. Within Area Converter, after conversion, retain the destination symbol beside the answer and keep the original entry available for review.
Within Area Converter, if multiple records use different units, convert each row to one agreed destination before adding, averaging, sorting, or comparing thresholds. Within Area Converter, do not edit the source column into an unlabeled mixture.
Checking the selected unit path
Translate the source to square meters, preserving the squared conversion factor, and compare that route with the selected destination unit.
Within Area Converter, an inverse conversion should recover the source within rounding. Within Area Converter, a second route is stronger when it uses a base unit or independently derived relationship rather than the same selected menus and value.
Within Area Converter, test a simple benchmark such as zero, one source unit, or a known reference quantity. Within Area Converter, for reciprocal or offset relationships, use the governing equation instead of assuming that doubling always behaves like a zero-offset multiplier.
Precision, limits, and related conversions
Important boundaries for Area Converter include sloped versus plan area, gross versus net boundaries, survey acres, irregular geometry, openings, overlaps, and squared rather than linear factors. Within Area Converter, keep the boundary that applies to the source record beside the converted answer.
Within Area Converter, round after the final required conversion, not at every intermediate menu change. Within Area Converter, the source measurement limits the defensible significant digits even when the interface displays a longer decimal.
For focused follow-up calculations from Area Converter, open Square Feet To Square Meters Converter and Acres To Hectares Converter. These linked pages keep the surface area source and destination visible and provide an inverse check for their specific unit pair.
Questions about Area Converter
How should a result from Area Converter be checked?
As an independent FAQ check for Area Converter, translate the source to square meters, preserving the squared conversion factor, and compare that route with the selected destination unit. FAQ guidance for Area Converter: also confirm that the inverse returns the entered source within the chosen rounding.
Why might another converter give a different answer?
FAQ guidance for Area Converter: differences can come from unit definitions, US versus Imperial conventions, decimal versus binary prefixes, reference conditions, reciprocal formulas, offset handling, or rounding. FAQ guidance for Area Converter: compare the exact source and destination definitions.
When should the conversion be repeated?
FAQ guidance for Area Converter: recalculate when the source value, source unit, destination unit, reference condition, or reporting precision changes. FAQ guidance for Area Converter: preserve the previous source record when the revision matters.