1,040 ppb to ppm

1,040 ppb = 1.04 ppm

ppbppm
1,025 ppb1.025
1,030 ppb1.03
1,035 ppb1.035
1,0401.04
1,045 ppb1.045
1,050 ppb1.05
1,055 ppb1.055

1040 ppb = 1.04 ppm

Formula

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