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By Shailendra Singh
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Updated on 5 Mar 2025, 16:29 IST
“PPM” stands for “parts per million.” It is a unit of measurement used to express the concentration of one substance within a larger mixture or solution. PPM indicates the number of units of a particular substance present in one million units of the total mixture. It’s often used in fields like chemistry, environmental science, and industry to represent very small concentrations.
“Percent” is a term that refers to a proportion or fraction out of 100. It’s a way of expressing a quantity or measurement relative to a whole, where 100% represents the entire amount. For example, if you have 50% of a certain substance in a mixture, it means that half of the mixture’s content is composed of that substance.
Converting parts per million (PPM) to percent is straightforward. The relationship between PPM and percent is as follows:
1 PPM = 0.0001 percent
To convert PPM to percent, you can use this formula:
Percent = PPM x 0.0001
For example, if you have a concentration of 500 PPM, the conversion to percent would be:
Percent = 500 * 0.0001 = 0.05%
So, 500 parts per million (PPM) is equivalent to 0.05 percent.
| ppm | Percent (%) |
| 0 ppm | 0% |
| 1 ppm | 0.0001% |
| 2 ppm | 0.0002% |
| 3 ppm | 0.0003% |
| 4 ppm | 0.0004% |
| 5 ppm | 0.0005% |
| 6 ppm | 0.0006% |
| 7 ppm | 0.0007% |
| 8 ppm | 0.0008% |
| 9 ppm | 0.0009% |
| 10 ppm | 0.001% |
| 20 ppm | 0.002% |
| 30 ppm | 0.003% |
| 40 ppm | 0.004% |
| 50 ppm | 0.005% |
| 60 ppm | 0.006% |
| 70 ppm | 0.007% |
| 80 ppm | 0.008% |
| 90 ppm | 0.009% |
| 100 ppm | 0.01% |
| 200 ppm | 0.02% |
| 300 ppm | 0.03% |
| 400 ppm | 0.04% |
| 500 ppm | 0.05% |
| 600 ppm | 0.06% |
| 700 ppm | 0.07% |
| 800 ppm | 0.08% |
| 900 ppm | 0.09% |
| 1000 ppm | 0.1% |
| 2000 ppm | 0.2% |
| 3000 ppm | 0.3% |
| 4000 ppm | 0.4% |
| 5000 ppm | 0.5% |
| 6000 ppm | 0.6% |
| 7000 ppm | 0.7% |
| 8000 ppm | 0.8% |
| 9000 ppm | 0.9% |
| 10000 ppm | 1% |
| 100000 ppm | 10% |
| 1000000 ppm | 100% |
PPM stands for parts per million. 1 PPM is equal to 0.0001% in terms of percentage. This means that if you have 1 part of a substance in a million parts of the whole mixture, it's equivalent to 0.0001%.
To convert PPM to a percentage, you can use the following formula: Percentage = (PPM value) × 0.0001% For example, if you have 1000 PPM, the equivalent percentage would be: Percentage = 1000 × 0.0001% = 0.1%
This is because percentage and PPM are based on different units of measurement. Percentage is based on parts per hundred (1%), while PPM is based on parts per million (1/1,000,000). Since 1% is larger than 1/1,000,000, 1% is equivalent to 10,000 PPM.
250 PPM means that there are 250 parts of a particular substance in a million parts of the whole mixture. In percentage terms, this would be 0.025%.
The formula for calculating PPM is: PPM = (Number of parts of the substance / Total number of parts) × 1,000,000 If you have 1 part of a substance in 1 million parts of the mixture, then you have 1 PPM.
PPM is calculated by taking the ratio of the number of parts of a specific substance to the total number of parts in the mixture, and then multiplying by 1,000,000. The formula is: PPM = (Number of parts of the substance / Total number of parts) × 1,000,000 This gives you the PPM value for that substance in the mixture.