pH to PPM
Estimate H+ PPM from pH level.
Verified ToolUpdated: January 10, 2026
Input Parameters
Calculated Result
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H+ Concentration (PPM)
Methodology & Sources
Since pH is the negative logarithm of H+ ion concentration in Molarity (mol/L), we reverse it by taking the antilog: [H+] = 10^(-pH). Multiplying by the atomic weight of Hydrogen (~1 g/mol) and 1000 yields the concentration in mg/L (PPM).
The underlying formula used is:
10^(-pH) * 1000
References
- Sørensen's definition of pH
Frequently Asked Questions
How do I convert pH to PPM?
First calculate the Molarity of H+ ions: M = 10^(-pH). Then multiply by 1000 to get mg/L (PPM).
Is this exact?
It is exact for the concentration of Hydrogen ions (H+), but does not account for total acid concentration in buffered solutions.
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Ensuring every tool adheres to ASTM/IUPAC standards. Committed to providing precise, transparent, and verifiable engineering resources.
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