About

What is Nankobun?

Nankobun ("how many of them") converts an area, length, weight, volume or speed into everyday things: Tokyo Domes, tatami mats, Mount Fujis, 1-yen coins and more. You can also convert the other way, such as "how many square feet are three Tokyo Domes?".

About the figures

Buildings, venues, vehicles, money and sports courts use figures checked against official announcements and public statistics, with sources listed on each page. Animals and everyday things without official figures use typical averages or estimates and are marked "approx.".

Results are simple division. They ignore shape, so they may differ from how many would actually fit side by side.

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