1,000J是多少cal？
1,000J = 239.006cal
是239.006cal，所以说成239cal也没问题——四舍五入的误差在0.5%以内。
反过来，1,000cal是多少J？
1,000cal = 4,184J
计算公式: cal = J × 0.239006
该数值前后的 J → cal
100 J23.901cal
200 J47.801cal
300 J71.702cal
400 J95.602cal
500 J119.503cal
600 J143.403cal
700 J167.304cal
800 J191.205cal
900 J215.105cal
1,000 J239.006cal
1,100 J262.906cal
1,200 J286.807cal
1,300 J310.707cal
1,400 J334.608cal
1,500 J358.509cal
1,600 J382.409cal
1,700 J406.31cal
1,800 J430.21cal
1,900 J454.111cal
2,000 J478.011cal