The result of your conversion between tatami [Japan] and rai appears here
To convert between Tatami [Japan] and Rai you have to do the following:
First divide 1.62 / 1600 = 0.0010125
Then multiply the amount of Tatami [Japan] you want to convert to Rai, use the chart below to guide you.
Symbol: tatami
No description
Symbol: rai
No description