5kWhは何MJですか？
5kWh = 18MJ
18MJなので18MJと言っても差し支えありません — 誤差は0.5%以内です。
逆に5MJは何kWhですか？
5MJ = 1.39kWh
計算式: MJ = kWh × 3.6
kWh → MJ 前後の値
0.5 kWh1.8MJ
1 kWh3.6MJ
1.5 kWh5.4MJ
2 kWh7.2MJ
2.5 kWh9MJ
3 kWh10.8MJ
3.5 kWh12.6MJ
4 kWh14.4MJ
4.5 kWh16.2MJ
5 kWh18MJ
5.5 kWh19.8MJ
6 kWh21.6MJ
6.5 kWh23.4MJ
7 kWh25.2MJ
7.5 kWh27MJ
8 kWh28.8MJ
8.5 kWh30.6MJ
9 kWh32.4MJ
9.5 kWh34.2MJ
10 kWh36MJ