Ppb means parts per billion. When you are talking about weight per volume, a gram is deemed equivalent to a millilitre. Micrograms per metre cubed means micrograms per 1000 litres. You will have to divide by 1000 to convert to micrograms per litre, giving you ppb.
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The conversion factor is 10 million. To convert to ppb to percent, you divide by 10 million.The conversion factor is 10 million. To convert to ppb to percent, you divide by 10 million.The conversion factor is 10 million. To convert to ppb to percent, you divide by 10 million.The conversion factor is 10 million. To convert to ppb to percent, you divide by 10 million.
One part per billion (ppb) denotes one part per 1,000,000,000 parts, one part in 109, 1/1,000,000,000 * 100% = 0.0000001% (or 1% = 10,000,000 ppb) and a value of 1 × 10−9. This is equivalent to one drop of water diluted into 250 chemical drums (50 m3), or about three seconds out of a century.