150 ppb to ppm

150 ppb = 0.15 ppm

ppbppm
135 ppb0.135
140 ppb0.14
145 ppb0.145
1500.15
155 ppb0.155
160 ppb0.16
165 ppb0.165

150 ppb = 0.15 ppm

Formula

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