Area Conversion
Convert area units
Features
Supports 43 area units
Broadly covers everything from the metric system to imperial units
Also converts Japanese units like tsubo and tatami
Mutually converts Japanese units including cho and tan with international units
Converts everything at once as you type
Instantly shows conversion values for all units, no button needed
Includes academic and historical units
Converts even specialized units such as barns and arpents
How to Use
Enter the value to convert
Enter a number in the "Value" field (decimal input supported)
Select the base unit of the input
Select the original unit, such as tsubo or square meters, from the "Base unit" dropdown
Check and copy the converted results
Check the value of each unit shown in the list and copy the rows you need with the copy button
Use Cases
Getting a feel for the size of a property
Convert the square-meter figure in listing info into tsubo or tatami to picture the size
Considering overseas properties or land
Convert acre or square-foot figures into familiar units for comparison
Unifying units for farmland area
Organize figures in documents that mix cho, tan, and hectares into a single unit
Support for studying science and math
Quickly check accurate conversion values for unit-conversion homework or answer checking
Basic Knowledge
Conversion formula between square meters and tsubo
Tsubo is a unit of area that has been used in Japan for a long time to measure land and building areas. One tsubo is approximately 3.3058 square meters.
- Square meters to tsubo：The conversion formula from square meters to tsubo is "tsubo = square meters × 0.3025". For example, 100 square meters is approximately 30.25 tsubo.
- Tsubo to square meters：The conversion formula from tsubo to square meters is "square meters = tsubo × 3.3058". For example, 30 tsubo of land is approximately 99.17 square meters.
What is tatami (jo)?
Tatami is a Japanese unit of measuring room size by the number of tatami mats. Since tatami specifications vary by region, 1 tatami = 1.62 square meters is used as the standard in real estate displays.
What are hectares and ares?
- Are：An are (a) is a unit of area equivalent to a square with sides of 10 meters. One are equals 100 square meters.
- Hectare：A hectare (ha) is a unit of area equivalent to 100 ares. One hectare equals 10,000 square meters (approximately 3,025 tsubo) and is commonly used to measure agricultural land and parks.
Safety and Privacy
Runs entirely in your browser
Your input data is processed only within your browser and is never sent externally.
Processing only in your browser
area conversion is processed entirely within your browser, and input data is not sent to any server.
Communications encrypted with HTTPS
Page loading is also encrypted by TLS, and content cannot be read by third parties.
No transmission to third parties
Input content is not sent to external services such as ad networks or trackers.
No automatic saving of results
conversion results and input suggestions are not stored on the server.
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