Un-phiauun-tō· ê phiau-sī, bo̍k-chêng thong-hêng ê un-phiau ū saⁿ-chióng, hun-pia̍t sī Liap-sī (Celsius a̍h centigrade), Hôa-sī (Fahrenheit), kap Khái-sī (Kelvin) un-phiau, kî-tiong Khái-sī un-phiau iā-chheng-chòe cho̍at-tùi un-phiau (absolute temperature scale).

  1. Liap-sī un-phiau ē-tàng-kóng sī pêng-siông-sî siāng-chia̍p-ēng--ê, hiān-chú-sî tāi-pō·-hūn ê kok-ka lóng chhái-iōng chit-chióng khah-hong-piān ê un-phiau.
  2. Hôa-sī un-phiau gôan-té sī Eng-gí kok-ka só· sú-iōng--ê, put-kò chit-má tî-liáu Bí-kok í-gōa, chin-chē Eng-gí kok-ka mā lóng chiām-chiām hòng-khì Hôa-sī un-phiau, chhái-iōng Liap-sī.
  3. Khái-sī un-phiau siāng-chú-iàu sī kho-ha̍k-kài teh sú-iōng--ê, chin-chē kong-sek lāi-té ê un-tō·, lóng-sī chhái-iōng khái-sī un-phiau.