500kWhは何MJですか？
500kWh = 1,800MJ
1,800MJなので1,800MJ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500MJは何kWhですか？
500MJ = 138.89kWh
計算式: MJ = kWh × 3.6
kWh → MJ 前後の値
50 kWh180MJ
100 kWh360MJ
150 kWh540MJ
200 kWh720MJ
250 kWh900MJ
300 kWh1,080MJ
350 kWh1,260MJ
400 kWh1,440MJ
450 kWh1,620MJ
500 kWh1,800MJ
550 kWh1,980MJ
600 kWh2,160MJ
650 kWh2,340MJ
700 kWh2,520MJ
750 kWh2,700MJ
800 kWh2,880MJ
850 kWh3,060MJ
900 kWh3,240MJ
950 kWh3,420MJ
1,000 kWh3,600MJ