In the US, water hardness is primarily measured in parts per million (PPM). Internationally, the degrees of Hardness (dH) or degrees of German Hardness (dGH) are commonly used to assess water hardness. To convert between Water Hardness PPM To dH, you may need to use conversion formulas.
Here are the water hardness levels expressed in both units:
Water Hardness Levels (US – PPM):
- Soft: 60 to 119 ppm
- Medium hard: 120 to 179 ppm
- Hard: 180 to 239 ppm
- Very hard: 240 to 500 ppm
Water Hardness Levels (International – dH or dGH):
- Soft: 4 to 8 dH
- Medium hard: 8 to 12 dH
- Hard: 12 to 18 dH
- Very hard: 18 to 30 dH
Table of Contents
Converts Hard Water Units
Here are some general conversion guidelines for common water hardness units:
- PPM to dH:
- For calcium carbonate (CaCO3) hardness: 1 ppm = 0.056 dH
- For general hardness (total hardness): 1 ppm = 0.07 dH
- dH to PPM:
- For calcium carbonate (CaCO3) hardness: 1 dH ≈ 17.86 ppm
- For general hardness (total hardness): 1 dH ≈ 14.29 ppm
To accurately convert between different water hardness units, a reliable water hardness calculator can be utilized (and consult the chart below the calculator). This handy tool not only provides the necessary conversion factors but also includes a reference chart for easy consultation. By inputting the water hardness value in either PPM or dH into the calculator, it will swiftly determine the corresponding value in the other unit.
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Formula PPM to GPG Calculator
dH = PPM / 17.848
Variables:
- dH is the Degree of Hardness
- PPM is the parts per million
To calculate the Degree of Hardness, divide the parts per million by 17.848
PPM To dH Chart
| PPM (Parts Per Million) | dH (Degrees of Hardness) |
|---|---|
| 0 | 0.056 |
| 1 | 0.028 |
| 5 | 0.28 |
| 10 | 0.56 |
| 15 | 0.84 |
| 20 | 1.12 |
| 25 | 1.40 |
| 30 | 1.68 |
| 35 | 1.96 |
| 40 | 2.24 |
| 45 | 2.52 |
| 50 | 2.80 |
| 60 | 3.36 |
| 70 | 3.92 |
| 80 | 4.48 |
| 90 | 5.04 |
| 100 | 5.60 |
| 110 | 6.16 |
| 120 | 6.72 |
| 130 | 7.28 |
| 140 | 7.84 |
| 150 | 8.40 |
| 160 | 8.96 |
| 170 | 9.52 |
| 180 | 10.09 |
| 190 | 10.65 |
| 200 | 11.21 |
| 250 | 14.01 |
| 300 | 16.81 |
| 350 | 19.61 |
| 400 | 22.41 |
| 450 | 25.21 |
| 500 | 28.01 |
| 550 | 30.82 |
| 600 | 33.62 |
| 650 | 36.42 |
| 700 | 39.22 |
| 750 | 42.02 |
| 800 | 44.82 |
| 850 | 47.62 |
| 900 | 50.43 |
| 950 | 53.23 |
| 1000 | 56.03 |
Let’s look at the water hardness chart for PPM and dH to get an idea how many PPM or dH is hard water:
Water Hardness PPM To dH Chart
| Hardness Level | PPM (Parts per Million) | dH (Degrees of Hardness) |
|---|---|---|
| Soft | 60 to 119 | 4 to 8 |
| Medium hard | 120 to 179 | 8 to 12 |
| Hard | 180 to 239 | 12 to 18 |
| Very hard | 240 to 500 | 18 to 30 |
Final Words:
By utilizing the PPM to dH calculator, referring to the conversion chart, and consulting this hard water chart, you can accurately assess the hardness level of your water. This comprehensive approach allows you to determine precisely how hard your water is and identify the specific PPM or dH range you need to achieve for your water to considered soft and safe for various uses.
If you have any queries or need assistance with water hardness calculations, feel free to share your water hardness values in the comment section below.
Provide us with the relevant numbers, and we’ll be more than happy to help you with the conversions and provide further guidance.
Thank you! for using this resource, and we look forward to assisting you with any water hardness-related questions or concerns you may have. Ensuring that your water meets the desired hardness level can lead to improved water quality, reduced scaling issues, and enhanced overall water performance for your daily needs.