Floor area converter

Convert between m², square feet, tsubo, and tatami mats — with the regional tatami standards.

Converted in this browser. Nothing is sent anywhere.

Tatami is not a fixed unit — pick the regional standard used in the listing, or the 1.62 m² minimum used in Japanese real-estate advertising rules. Inputs up to 1,000,000 m²; results are rounded to 4 decimals.

How to use

  1. Enter an area and its unit.
  2. Choose the tatami standard if relevant.
  3. Read all four units.

What it supports

m², sq ft, tsubo (400/121 m²), and tatami in five standards — the 1.62 m² ad-rule plus Kyoma, Chukyoma, Edoma, and Danchima. Up to 1,000,000 m².

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