1千克力·米/秒(kgf·m/s)= 9.80665瓦(w)
1米制馬力(hp)= 735.499瓦(W)
1卡/秒(cal/s)=4.1868瓦(W) 1英熱單位/時(Btu/h)= 0.293071瓦(W)
1千瓦(kW)= 3.6×10^6焦耳(J)/小時（h)