20斤是多少g？
20斤 = 10,000g
是10,000g，所以说成10,000g也没问题——四舍五入的误差在0.5%以内。
反过来，20g是多少斤？
20g = 0斤
计算公式: g = 斤 × 500
该数值前后的 斤 → g
2 斤1,000g
4 斤2,000g
6 斤3,000g
8 斤4,000g
10 斤5,000g
12 斤6,000g
14 斤7,000g
16 斤8,000g
18 斤9,000g
20 斤10,000g
22 斤11,000g
24 斤12,000g
26 斤13,000g
28 斤14,000g
30 斤15,000g
32 斤16,000g
34 斤17,000g
36 斤18,000g
38 斤19,000g
40 斤20,000g