Parts per million as CaCO₃ to degrees of carbonate hardness
Type a value in ppm to get it in dKH instantly.
0.4482dKH
Nothing on our list is smaller: soft, poorly buffered water is 2.5× higher. That is low: the pH here can swing sharply overnight.
Convert the other way: dKH to ppm
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 ppm to dKH
To convert parts per million as CaCO₃ to degrees of carbonate hardness, multiply by 0.0560287.
Example: 8 ppm × 0.0560287 = 0.448229 dKH.
In the other direction, 1 dKH = 17.848 ppm.
Every unit
Your alkalinity in every unit
Tables
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 |
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 |
Quick answers
Quick answers
- How many dKH is 1 ppm?
- 1 ppm is 0.0560287 dKH.
- How many dKH is 10 ppm?
- 10 ppm is 0.560287 dKH.
- How many dKH is 8 ppm?
- 8 ppm is 0.448229 dKH.
The units
About these units
Parts per million as CaCO₃ (ppm)
The water treatment and pool standard.
Degrees of carbonate hardness (dKH)
The aquarium unit. One dKH is 17.85 ppm.
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