Question

what is used to measure heat​

Answer 1

The quantity used to measure heat is Joules (pronounced as the same jeweles).

$\huge{\bold {\blue {Joules }}}$

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There are many cases in which we use many different types of measuring the heat... Like, heat rate...

$\huge {\bold {\blue {hope \: it \: helps}}}$

Answer 2

An outdoor thermometer used to measure the average thermal energy in the air. A thermal infrared camera used to image heat. . Heat is measured in quantities called joules (pronounced the same as jewels) in the metric system and in British Thermal Units (BTU) in the English system. Heat can also be measured in calories