What SI unit is energy measured in? Physics Introduction to Physics Measurement and Units 1 Answer Biology_geek Apr 19, 2014 Energy is measured in joules (J). #1 J = 1 N * m# and since #1 N = 1 kg * m / s^2# #1 J = 1 kg * m^2 / s^2# Answer link Related questions Why do scientists prefer the SI units over the old English system of measurement? What is the SI unit force weight work and energy? What is the smallest metric measurement? Why is measurement accuracy important? Why are measurements approximations? What is the SI derived unit of electric charge? Are si units the same as metric units? Why are standardized units of measurement important? What units of measurement are used to describe wavelengths? What are metric units? See all questions in Measurement and Units Impact of this question 10315 views around the world You can reuse this answer Creative Commons License