How many cal is 25 J?
25 J = 5.975 cal
It is 5.975 cal, so saying 6 cal is fine — rounding is within 0.5%.
And how many J is 25 cal?
25 cal = 104.6 J
Formula: cal = J × 0.239006
J to cal around this value
7 J1.673cal
9 J2.151cal
11 J2.629cal
13 J3.107cal
15 J3.585cal
17 J4.063cal
19 J4.541cal
21 J5.019cal
23 J5.497cal
25 J5.975cal
27 J6.453cal
29 J6.931cal
31 J7.409cal
33 J7.887cal
35 J8.365cal
37 J8.843cal
39 J9.321cal
41 J9.799cal
43 J10.277cal
45 J10.755cal