Convert Tatami Mat to Square Inch

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Conversion Formula:

in² = tatami × 2511.005022

Convert Tatami Mat to Square Inch (tatami to in²) instantly with accurate, readable results.

Convert between square meters, acres, square feet, hectares, and other common units with our Area Unit Converter. This intuitive unit conversion tool helps you calculate land size, floor space, and surface area across both metric and imperial systems. Whether you're working on real estate, construction, or geography tasks, our area unit conversion calculator ensures precise and instant results.

From unit

Tatami mat (畳, jō) - Japanese flooring unit of area

Tatami mat is a traditional Japanese flooring module used as a practical unit of area; room sizes are often stated by the count of mats (jō). Dimensions vary regionally, so one tatami has no single national standard.

  • Names/aliases: tatami, 畳 (jō); room size written as “n-jō”
  • System: Traditional Japanese (non-SI)
  • Typical sizes (area):

• Kyōma (Kyoto): 0.955 m × 1.910 m = 1.824 m² ≈ 19.63 ft²

• Chūkyōma (Nagoya): 0.910 m × 1.820 m = 1.656 m² ≈ 17.83 ft²

• Edoma/Kantōma (Tokyo area): 0.880 m × 1.760 m = 1.5488 m² ≈ 16.67 ft²

• Other regional modules exist; common range ≈ 1.55–1.82 m² per mat

  • Room estimates: 6-jō room ≈ 9–11 m² depending on region; 8-jō ≈ 12–15 m²
  • Construction note: buildings often use tatami modules as planning grids; mats are rectangular with length ≈ 2 × width
To unit

Square inch (in²) - Imperial/US area unit

Square inch is an Imperial/US customary unit of area equal to a square 1 inch on a side. Used for small surface areas in manufacturing, displays, and hardware specs.

  • Symbol: in²
  • System: Imperial/US customary
  • Exact relations: 1 in² = (2.54 cm)² = 6.4516 cm² = 0.00064516 m² = 645.16 mm²
  • Other relations: 1 in² = 1/144 ft² ≈ 0.006944444 ft² ≈ 0.000771605 yd²
  • Typical examples: screen area, gasket/washer footprints, cross-sectional areas in inch–pound drawings