浓度（质量）是指组成部分的质量除以混合物的总体积。它通常以每立方米（kg/m³）公斤（千克）进行测量。
1 lb/gal = 119,826,000 mg/m³
1 mg/m³ = 8.3454e-9 lb/gal
例子:
将15 每加仑磅转换为每立方米：
15 lb/gal = 1,797,390,000 mg/m³
| 每加仑磅 | 每立方米 |
|---|---|
| 0.01 lb/gal | 1,198,260 mg/m³ |
| 0.1 lb/gal | 11,982,600 mg/m³ |
| 1 lb/gal | 119,826,000 mg/m³ |
| 2 lb/gal | 239,652,000 mg/m³ |
| 3 lb/gal | 359,478,000 mg/m³ |
| 5 lb/gal | 599,130,000 mg/m³ |
| 10 lb/gal | 1,198,260,000 mg/m³ |
| 20 lb/gal | 2,396,520,000 mg/m³ |
| 30 lb/gal | 3,594,780,000 mg/m³ |
| 40 lb/gal | 4,793,040,000 mg/m³ |
| 50 lb/gal | 5,991,300,000 mg/m³ |
| 60 lb/gal | 7,189,560,000 mg/m³ |
| 70 lb/gal | 8,387,820,000 mg/m³ |
| 80 lb/gal | 9,586,080,000 mg/m³ |
| 90 lb/gal | 10,784,340,000 mg/m³ |
| 100 lb/gal | 11,982,600,000 mg/m³ |
| 250 lb/gal | 29,956,500,000 mg/m³ |
| 500 lb/gal | 59,913,000,000 mg/m³ |
| 750 lb/gal | 89,869,500,000 mg/m³ |
| 1000 lb/gal | 119,826,000,000 mg/m³ |
| 10000 lb/gal | 1,198,260,000,000 mg/m³ |
| 100000 lb/gal | 11,982,600,000,000 mg/m³ |
规则