Skip to content
Myclass24

What are the 4 units of heat?

GeneralClass 12AllAnswered 27 Mar 2026
Answer

The four common units for measuring heat energy are:

  1. Joule (J) - SI unit, standard in science
  2. Calorie (cal) - energy to raise 1g of water by 1°C; 1 cal = 4.184 J
  3. Kilocalorie (kcal or Cal) - dietary "Calorie"; 1 kcal = 1000 cal
  4. British Thermal Unit (BTU) - energy to raise 1 lb of water by 1°F; used in HVAC

Joules are preferred in scientific work, while BTUs remain common in engineering applications

Suggested Q&A

General · Class 12