Cal是热量（能量）单位。 卡路里 （简称卡，缩写为cal），由英文calorie音译而来，其定义为在1个 大气压 下，将1克水提升1 摄氏度 所需要的热量；卡路里（calorie）是能量单位，现在仍. 1kj=1/4.186=0.2389kcal。 1、1 kcal（千卡）=4186 j（焦耳）=4.186 kj（千焦）。1 cal（卡）=4.2 j（焦） 2、kcal也叫做大卡。 热量单位，等于1000 cal（卡），亦即1 kg水温度升高1℃.
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