What does ～計 mean?
～計 is a Japanese noun meaning “-meter” or “gauge (suffix)” in English. It can also be translated as “total (before a number)” depending on context. It is written as ～計 in kanji, ～けい in hiragana, and ～kei in romaji. This word is part of JLPT N3 vocabulary.
NoteSuffix for a measuring instrument (体温計 = thermometer).
Example sentences
体温計で熱を測った。
I took my temperature with a thermometer.
部屋に温度計を置いた。
I put a thermometer in the room.