Plutocalc Water
Instant calculations for environmental professionals

Plutocalc is the most complete calculator for water treatment, wastewater, hydraulics, environmental chemistry and unit conversions. Plutocalc solvers were carefully tuned to require minimal inputs and provide accurate results based on the latest advances in science and engineering.


  • 103 solvers
  • 2670+ possible calculations
  • Self explanatory diagrams
  • Unit conversions
  • Chemical properties database
  • Results as you type
  • Plant operation and design emphasis
  • 100% offline
  • Online, App and Portable versions
  • Multiple interface languages
  • Advanced calculator and conversions directly from the search bar
  • Beautiful paper prints
  • Active development
  • Free and fast. Very fast!

What's new

  • Version 15.1
  • Version 15 - Colorful diagrams
    • New: colorful diagrams for 35 solvers
    • New: Notepad saves notes between sessions (Plutocalc+ only)
    • New: Easy clipboard feature integrates with the operating system (Plutocalc+ only)
    • Improved translations and bug fixes
    • All changes and version history
  • Version 14.1 - Calculator
  • Plutocalc is Free!

    For over 10 years, Plutocalc has been actively developed, improved and made available for free without displaying a single ad or asking for a subscription. It is the most popular water treatment app on the internet with thousands of experts relying on it for their everyday professional needs.

    If you like this tool, please consider making a small donation from time to time to support the recurring costs: licenses, hosting, technical literature and donations to the developers of the open source libraries.

    Get Plutocalc

    Get it on Google Play Get it on the Amazon App Store Download from the Apple iTunes Store


    Plutocalc+ has the same solvers than the regular version but comes with some extras features for generous supporters:

    • Early release of new versions: get the new features before everyone. Does not apply for security or bug fixes.
    • Deep Search enabled: Expands the search index to database items and solver variable names.
    • PlutoPad: a tool to log calculation inputs and outputs. Tap the pen icon to log the active field.
    • Copy and Paste: move your data faster between fields without having to type again or even highlight source data field.
    • Priority support by e-mail in English, Portuguese or Spanish.
    Get it on Google Play Download from the Apple iTunes Store Get it on the Amazon App Store

    Plutocalc Designer

    Plutocalc Designer is a compilation of tools for water and wastewater treatment plant sizing. It provides detailed design reports based on the latest engineering practices. Please check the Plutocalc Designer page for more information.

    Model/Solver list

    Unit conversions

    Geometry and sizing standards

    Energy, head loss and power

    Contaminants and quality indices

    Solutions and Chemicals

    Adsorption and Ion Exchange

    Filters and membranes (Ultrafiltration, Nanofiltration and Reverse Osmosis)

    Chemical and biological reactions




    Please contact the developer at [email protected] for feature requests, bug reporting and the sponsorship program. Translation contributions are always welcome.


    Plutocalc was created and developed by Daniel BP and is distributed under this End User License and Privacy Agreement.

    Privacy policy

    Plutocalc application does not collect or transmit any data from it's users or from the systems where it runs.
    The website might collect anonymous navigation statistics such as the user agent, operating system, IP address, pages accessed and the country of origin. Any data that could lead to a possible user identification (like the IP address) will be kept in secret from 3rd parties like partners, sponsors and affiliates.