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40 ppb to ppm

40 ppb = 0.04 ppm

ppbppm
34 ppb0.034
36 ppb0.036
38 ppb0.038
400.04
42 ppb0.042
44 ppb0.044
46 ppb0.046

40 ppb = 0.04 ppm

Formula

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

← All concentration conversions (ppm, ppb, %, mg/L, g/L)