How many MJ is 20 kWh?
20 kWh = 72 MJ
It is 72 MJ, so saying 72 MJ is fine — rounding is within 0.5%.
And how many kWh is 20 MJ?
20 MJ = 5.56 kWh
Formula: MJ = kWh × 3.6
kWh to MJ around this value
2 kWh7.2MJ
4 kWh14.4MJ
6 kWh21.6MJ
8 kWh28.8MJ
10 kWh36MJ
12 kWh43.2MJ
14 kWh50.4MJ
16 kWh57.6MJ
18 kWh64.8MJ
20 kWh72MJ
22 kWh79.2MJ
24 kWh86.4MJ
26 kWh93.6MJ
28 kWh100.8MJ
30 kWh108MJ
32 kWh115.2MJ
34 kWh122.4MJ
36 kWh129.6MJ
38 kWh136.8MJ
40 kWh144MJ