494.5 mg/L = 494.5 ppm
| mg/L | ppm |
|---|---|
| 479.5 mg/L | 479.5 |
| 484.5 mg/L | 484.5 |
| 489.5 mg/L | 489.5 |
| 494.5 | 494.5 |
| 499.5 mg/L | 499.5 |
| 504.5 mg/L | 504.5 |
| 509.5 mg/L | 509.5 |
494.5 mg/L = 494.5 ppm
1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm