Degrees of carbonate hardness to parts per million as CaCO₃
Type a value in dKH to get it in ppm instantly.
142.8ppm
That's about the same as a reef aquarium. That is well buffered, the range aquariums and pools aim for.
Convert the other way: ppm to dKH
What it means
How well buffered is it?
Alkalinity is reported as calcium carbonate by convention, even though most of it is really bicarbonate. That convention is what makes the units comparable.
The math
How to convert dKH to ppm
To convert degrees of carbonate hardness to parts per million as CaCO₃, multiply by 17.848.
Example: 8 dKH × 17.848 = 142.784 ppm.
In the other direction, 1 ppm = 0.0560287 dKH.
Every unit
Your alkalinity in every unit
Tables
dKH to ppm conversion table
| dKH | ppm |
|---|---|
| 10 dKH | 178.48 ppm |
| 20 dKH | 356.96 ppm |
| 40 dKH | 713.92 ppm |
| 60 dKH | 1,070.88 ppm |
| 80 dKH | 1,427.84 ppm |
| 100 dKH | 1,784.8 ppm |
| 120 dKH | 2,141.76 ppm |
| 143 dKH | 2,552.26 ppm |
| 180 dKH | 3,212.64 ppm |
| 250 dKH | 4,462 ppm |
| 400 dKH | 7,139.2 ppm |
ppm to dKH conversion table
| ppm | dKH |
|---|---|
| 10 ppm | 0.560287 dKH |
| 20 ppm | 1.12057 dKH |
| 40 ppm | 2.24115 dKH |
| 60 ppm | 3.36172 dKH |
| 80 ppm | 4.48229 dKH |
| 100 ppm | 5.60287 dKH |
| 120 ppm | 6.72344 dKH |
| 143 ppm | 8.0121 dKH |
| 180 ppm | 10.0852 dKH |
| 250 ppm | 14.0072 dKH |
| 400 ppm | 22.4115 dKH |
Quick answers
Quick answers
- How many ppm is 1 dKH?
- 1 dKH is 17.848 ppm.
- How many ppm is 10 dKH?
- 10 dKH is 178.48 ppm.
- How many ppm is 8 dKH?
- 8 dKH is 142.784 ppm.
The units
About these units
Degrees of carbonate hardness (dKH)
The aquarium unit. One dKH is 17.85 ppm.
Parts per million as CaCO₃ (ppm)
The water treatment and pool standard.
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