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By Shailendra Singh
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Updated on 5 Mar 2025, 16:26 IST
A percent is a way to express a portion or ratio out of 100. It represents a value as a fraction of 100, making comparisons easier.
PPM, or parts per million, is a measurement used to quantify very small concentrations of a substance in a larger solution, indicating the number of parts of a specific substance per one million parts of the solution.
To convert a percentage to parts per million (ppm), follow these steps:
Here’s the formula:
PPM = (Percentage / 100) * 1,000,000
Example – convert 2.5% to ppm:
Ans. Percentage = 2.5%
Decimal Fraction = 2.5 / 100 = 0.025
PPM = 0.025 * 1,000,000 = 25,000 ppm
So, 2.5% is equivalent to 25,000 ppm.
| Percent (%) | ppm |
| 0% | 0 ppm |
| 0.0001% | 1 ppm |
| 0.001% | 10 ppm |
| 0.01% | 100 ppm |
| 0.1% | 1000 ppm |
| 1% | 10000 ppm |
| 2% | 20000 ppm |
| 3% | 30000 ppm |
| 4% | 40000 ppm |
| 5% | 50000 ppm |
| 6% | 60000 ppm |
| 7% | 70000 ppm |
| 8% | 80000 ppm |
| 9% | 90000 ppm |
| 10% | 100000 ppm |
| 20% | 200000 ppm |
| 30% | 300000 ppm |
| 40% | 400000 ppm |
| 50% | 500000 ppm |
| 60% | 600000 ppm |
| 70% | 700000 ppm |
| 80% | 800000 ppm |
| 90% | 900000 ppm |
| 100% | 1000000 ppm |
Converting percentage to parts per million (ppm) involves multiplying the percentage value by 10,000. This conversion allows you to express a small proportion of a substance within a larger mixture in a more precise manner.
The conversion factor of 10,000 is used to convert percentage to ppm. This factor is derived from the idea that per cent means out of 100. Since there are 10,000 parts per million in one percent (1% = 10,000 ppm), this conversion factor is employed to maintain consistent proportions.
Yes, that's correct. One percent is equal to 10,000 parts per million (ppm).
One percent is equivalent to 10,000 parts per million (ppm). This means that in a mixture, if a substance constitutes 1% of the total, it also corresponds to 10,000 parts out of a million.
PPM is calculated by multiplying the decimal representation of a percentage by 1,000,000. Alternatively, you can also multiply the percentage by 10,000 to get the PPM value. The formula is: PPM = Percentage × 10,000 or PPM = Percentage × 1,000,000.
No, 1 PPM (parts per million) is not greater than 1 percent. In fact, 1 PPM represents a smaller proportion compared to 1 percent. While 1 percent is 10,000 PPM, 1 PPM is just 0.0001 percent.
An example of 1 PPM could be the concentration of a trace element in water. If a certain metal is present in water at a concentration of 1 PPM, it means there is 1 part of that metal for every 1 million parts of water. This demonstrates the ability of PPM to express extremely low concentrations accurately.
