How many kJ is 120 kcal?
120 kcal = 502.08 kJ
It is 502.08 kJ, so saying 502 kJ is fine — rounding is within 0.5%.
And how many kcal is 120 kJ?
120 kJ = 28.68 kcal
Formula: kJ = kcal × 4.184
kcal to kJ around this value
30 kcal125.52kJ
40 kcal167.36kJ
50 kcal209.2kJ
60 kcal251.04kJ
70 kcal292.88kJ
80 kcal334.72kJ
90 kcal376.56kJ
100 kcal418.4kJ
110 kcal460.24kJ
120 kcal502.08kJ
130 kcal543.92kJ
140 kcal585.76kJ
150 kcal627.6kJ
160 kcal669.44kJ
170 kcal711.28kJ
180 kcal753.12kJ
190 kcal794.96kJ
200 kcal836.8kJ
210 kcal878.64kJ
220 kcal920.48kJ