520.5 ppm to ppb

520.5 ppm = 520,500 ppb

ppmppb
505.5 ppm505,500
510.5 ppm510,500
515.5 ppm515,500
520.5520,500
525.5 ppm525,500
530.5 ppm530,500
535.5 ppm535,500

520.5 ppm = 520,500 ppb

Formula

1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm