Convert Jō (畳/Tatami) to square metres
East Asia · East Asian Land · active · modern
Conventional value The unit is customary but its modern value is settled and widely cited; the arithmetic itself is exact.
1 Jō (畳/Tatami) = 1.653 square metres
square metres = Jō (畳/Tatami) × 1.653
Convert any amount
Jō (畳/Tatami) to square metres table
| Jō (畳/Tatami) | square metres |
|---|---|
| 0.25 Jō (畳/Tatami) | 0.41325 square metres |
| 0.5 Jō (畳/Tatami) | 0.8265 square metres |
| 1 Jō (畳/Tatami) | 1.653 square metres |
| 2 Jō (畳/Tatami) | 3.306 square metres |
| 3 Jō (畳/Tatami) | 4.959 square metres |
| 4 Jō (畳/Tatami) | 6.612 square metres |
| 5 Jō (畳/Tatami) | 8.265 square metres |
| 10 Jō (畳/Tatami) | 16.53 square metres |
| 20 Jō (畳/Tatami) | 33.06 square metres |
| 25 Jō (畳/Tatami) | 41.325 square metres |
| 50 Jō (畳/Tatami) | 82.65 square metres |
| 100 Jō (畳/Tatami) | 165.3 square metres |
About the Jō (畳/Tatami)
Japanese room measure = 1 Tatami mat ≈ 1.65 m².
- Symbol
- 畳
- Value in SI
- 1 Jō (畳/Tatami) = 1.653 square metre
- Typical use
- surveying
- Source
- UnitConvertLab measurement atlas
Every atlas conversion routes through the SI square metre. See our methodology and data provenance pages for how these values are sourced and verified.
Related units and variant risk
Other east asian land units in the East Asia family, least settled first. If your figure came from a land record, invoice or historical document rather than a calculator, check these before assuming a single standard.
Related conversions
Frequently asked
How many square metres are in a Jō (畳/Tatami)?
1 Jō (畳/Tatami) = 1.653 square metres. Multiply the number of Jō (畳/Tatami) by 1.653 to get square metres.
What is Jō (畳/Tatami) used for?
Japanese room measure = 1 Tatami mat ≈ 1.65 m². It is classified as active and dates from the modern period.
Is the Jō (畳/Tatami) value exact?
Yes for practical purposes. UnitConvertLab converts every atlas unit through the SI square metre, so the arithmetic itself introduces no rounding beyond the digits shown.
How reliable is this Jō (畳/Tatami) conversion?
Conventional value — The unit is customary but its modern value is settled and widely cited; the arithmetic itself is exact. Source: UnitConvertLab measurement atlas.
Cite this page
UnitConvertLab. (2026). Convert Jō (畳/Tatami) to square metres. UnitConvertLab. Retrieved from https://unitconvertlab.com/regional/jo-to-square-meter
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