30근是多少g？
30근 = 18,000g
是18,000g，所以说成18,000g也没问题——四舍五入的误差在0.5%以内。
反过来，30g是多少근？
30g = 0근
计算公式: g = 근 × 600
该数值前后的 근 → g
12 근7,200g
14 근8,400g
16 근9,600g
18 근10,800g
20 근12,000g
22 근13,200g
24 근14,400g
26 근15,600g
28 근16,800g
30 근18,000g
32 근19,200g
34 근20,400g
36 근21,600g
38 근22,800g
40 근24,000g
42 근25,200g
44 근26,400g
46 근27,600g
48 근28,800g
50 근30,000g