500斤是多少g？
500斤 = 250,000g
是250,000g，所以说成250,000g也没问题——四舍五入的误差在0.5%以内。
反过来，500g是多少斤？
500g = 1斤
计算公式: g = 斤 × 500
该数值前后的 斤 → g
50 斤25,000g
100 斤50,000g
150 斤75,000g
200 斤100,000g
250 斤125,000g
300 斤150,000g
350 斤175,000g
400 斤200,000g
450 斤225,000g
500 斤250,000g
550 斤275,000g
600 斤300,000g
650 斤325,000g
700 斤350,000g
750 斤375,000g
800 斤400,000g
850 斤425,000g
900 斤450,000g
950 斤475,000g
1,000 斤500,000g