Taiwan / Units
Ping Converter (坪 to m²)
Convert ping (坪), the unit Taiwan uses for flats and offices, to square metres and square feet, plus Taiwan catties and taels (臺斤, 臺兩) to kilograms.
Ping Converter (坪 to m²): A ping is a square 6 Taiwan feet on each side, and a Taiwan foot is 10/33 of a metre, so 1 ping = 400/121 m², about 3.3058 m², and 1 m² = 0.3025 ping exactly. A Taiwan catty (臺斤) is 600 g and holds 16 taels (臺兩) of 37.5 g; the mainland jin (市斤) is 500 g. Runs 100% locally in your browser with zero server file uploads.
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Area
Weight
30 ping is 99.17 m² and 1,067.5 ft².
A ping is the area of two tatami mats, 6 × 6 Taiwan feet; with a Taiwan foot of 10/33 m, that is 400/121 m², about 3.3058 m², and one square metre is exactly 0.3025 ping. A Taiwan catty is 600 g and has 16 taels of 37.5 g; the mainland jin is 500 g.
Common sizes
10 ping is 33.06 m², 20 ping 66.12 m², 30 ping 99.17 m², and 40 ping 132.23 m². In the other direction, 50 m² is 15.13 ping and 100 m² is 30.25 ping.
To measure a room shape by shape, use the square footage calculator, which also gives square metres.
Reading a Taiwanese listing
A flat's advertised ping usually covers the main rooms, balconies, and a share of the building's common areas (公設), so the space inside the door can be noticeably smaller than the headline figure. The listing's 主建物 figure is the indoor area.
How to use it
- Type an area in ping, square metres, or square feet.
- Read it in the other two units.
- Convert weights in Taiwan catties, taels, kilograms, or mainland jin the same way.
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Frequently asked questions
How big is 30 ping?
About 99.2 m², or 1,067 ft²; Taiwanese listings usually include balconies and a share of the common areas in that figure.
Why is a ping often said to be two tatami?
A ping is close to the area of two traditional Japanese tatami mats, from the period when Taiwan used Japanese measures.
Is a Taiwan catty the same as a mainland jin?
No: a Taiwan catty is 600 g, a mainland jin 500 g, and the Hong Kong catty about 604.8 g.
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