# Plutocalc+ Water — Engineering calculator

> Comprehensive offline engineering calculator for water treatment and environmental chemistry. (iPhone/iPad app by Daniel Peig.)

- Source: https://appshunter.io/ios/app/plutocalc-plus-water/id1142058236 (this page in markdown: same URL + `.md`)
- Developer: [Daniel Peig](https://appshunter.io/developer/1142058235)
- Category: Utilities, Productivity
- Price: $4.99
- Rating: 4.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 12.0 · 4 MB
- Languages: American English
- Released: 2016-09-06
- Data updated: 2026-08-29
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/plutocalc-plus-water/id1142058236/reviews.md

## What is Plutocalc+ Water?

Plutocalc is the most complete and popular problem solver suite for water treatment, wastewater, hydraulics, environmental chemistry and unit conversions.

Plutocalc+ is a premium version of the free Plutocalc packed some extras. For iOS, only the premium version is available.

Features:
- 103 solvers
- 2670+ different calculations
- Self explanatory diagrams
- Internal databases for chemicals and standards
- Results as you type, nothing is faster than that!
- Multiple languages: English, Portuguese and Spanish
- Available for multiple platforms
- 100% offline, no data connection required
- Advertisement free

NOTE: If after the update the program loads to a blank screen, just reinstall to fix. 

Solver list:

Conversions
- Angle
- Area
- Conductivity and resistivity
- Density and concentration
- Energy
- Flow - mass
- Flow - volumetric
- Flux and rates
- Forces
- Hardness in water
- Length
- Mass
- Power
- Pressure
- Speed
- Temperature
- Time
- Volume

Geometry
- Buffer tank capacity
- Cylinder volume
- Cone volume
- Cube volume
- Circle properties (radius, diameter, perimeter and area)
- Horizontal cylindrical tank volume
- Triangle properties with sides/angles determination
- Municipal plants flow estimation
- Nominal pipe sizes and wall thickness
- Sieve sizes according
- Rainfall volume

Energy and power
- Head loss in pipes
- Open channels or partially filled pipes
- Orifice plates with incompressible fluids
- Parshall flumes flow measurement
- Rectangular flumes flow measurement
- Flow adjustment for dosing/metering pumps
- Pump power and energy consumption
- Blowers and compressors power and energy consumption
- Mixing velocity gradient
- Reynolds number and speed

Contaminants
- Boiler water quality and blowdown
- Periodic table of elements with oxidation states
- Ionic Balance and Conductivity
- CO2 conductivity in pure water
- TOC, COD and KMnO4 relations
- Langlier Saturation Index - LSI
- Ryznar Stability Index - RSI
- Silt Density Index - SDI
- Modified Fouling Index - MFI
- Sludge Volume Index - SVI

Solutions
- Chemical dosing flow, mass and concentrations
- Dry chemical dosing flow
- Chemical solutions density database
- Water properties (viscosity, density)
- Gases properties (density and molecular weight)
- Oxygen solubility in water
- Multiple streams blending
- Specific gravity, Baumé, Brix and API relations

Adsorption and Ion Exchange
- Sorption/Exchange capacity
- Empty Bed Contact Time and BV/h
- Ion Exchange regeneration
- Ion Exchange softener design

Filters and membranes (Reverse Osmosis, Ultrafiltration and Nanofiltration)
- Cylindrical filter rate and speed
- Microfiltration / Ultrafiltration comparison and normalization
- Reverse Osmosis membranes and datasheets comparison
- Reverse Osmosis plant normalization and performance comparison
- Reverse Osmosis / NF skid design
- Recovery
- Recovery for membranes in series
- Normalized permeability
- Granular media head loss (sand, resins, anthracite, carbon and custom)
- Granular media backwash expansion rate

Reactions
- pH equilibrium for: Ammonia, Sulfates, Boric Acid, Sulfides, Silicic Acid, Phosphates and Nitrous Acid
- Equilibrium for Carbonates with temperature dependence
- Disinfection with Chlorine, Chlorine Dioxide, Chloramines and Ozone
- Disinfection with Chlorine for Giardia Cysts
- Disinfection with UV
- Iron oxidation and precipitation
- Manganese oxidation and precipitation
- Sludge from chemicals
- Food-to-microorganisms ratio - F/M
- Ultimate BOD

Clarifiers
- Surface loading rate - circular
- Surface loading rate - rectangular
- Hydraulic retention time - HRT
- Solids retention time - SRT
- Solids loading rate
- Volumetric solids loading rate
- Return activated sludge recycle - RAS
- Discrete sedimentation
- Sludge concentration and mass
- Sludge age

Finance
- Ordinary annuity
- Annuity due
- Compound annual growth rate - CAGR
- Interest rate conversions
- Simple interest

## Key features

- 103 solvers for water treatment and hydraulics
- 2670+ calculations with instant results
- Self-explanatory diagrams
- Internal chemical and standards databases
- 100% offline functionality
- Multiple language support
- Advertisement-free experience


## Frequently asked questions about Plutocalc+ Water

### What is Plutocalc+ Water?

Plutocalc+ Water is a premium engineering calculator suite designed for water treatment, hydraulics, and environmental chemistry. It offers a vast array of solvers and calculations, functioning entirely offline and without advertisements.

### How many solvers are included in Plutocalc+ Water?

Plutocalc+ Water includes an extensive 103 solvers, covering a wide range of applications within water treatment, hydraulics, and environmental chemistry. This allows for over 2670 different calculations.

### Does Plutocalc+ Water require an internet connection?

No, Plutocalc+ Water is designed to be 100% offline. No data connection is required to use any of its solvers or features, making it ideal for fieldwork or areas with limited connectivity.

### What languages does Plutocalc+ Water support?

Plutocalc+ Water is available in multiple languages, including English, Portuguese, and Spanish. This broad language support makes it accessible to a wider range of international users.

### Is Plutocalc+ Water suitable for beginners?

While it is a powerful engineering tool, Plutocalc+ Water features self-explanatory diagrams and provides results as you type, which can aid users in understanding the calculations. Its comprehensive nature is best suited for professionals in the field.

### What platforms is Plutocalc+ Water available on?

Plutocalc+ Water is available for iOS devices, specifically iPhones and iPads. The developer notes it is also available for multiple platforms, suggesting broader compatibility beyond iOS.

### How often is Plutocalc+ Water updated?

The latest version of Plutocalc+ Water is 15.4, which was last updated on July 15, 2025. Updates aim to improve functionality and fix any potential issues, such as the blank screen problem noted by the developer.

### What is the price of Plutocalc+ Water?

Plutocalc+ Water is a paid application, priced at $4.99. This one-time purchase grants access to all its premium features and solvers without ongoing subscription fees.

## Version history (last 5 releases)

### 15.4 — 2025-07-15

Version 15.4
- Updated build target (IOS 26)

### 15.2 — 2024-07-21

Version 15.2
- Minor text corrections
- Engine optimizations

### 15.1 — 2023-08-17

Version 15.1
- Fixed mg/L to lb/ft³ unit conversion in the chemical dosing calculator

### 15.0 — 2023-07-03

Plutocalc 15
- New: colorful diagrams for 35 solvers
- New: Notepad saves notes between sessions
- New: Better internal clipboard integration with the operating system
- Improved: Internal navigation
- Improved: Translations, descriptions and overall texts

### 14.1 — 2021-06-12

Version 14.1
- Solve equations and convert units directly from the search box
Version 14
- New user interface: faster and compact
- New search bar with "deep search" enabled for iOS users
- Text descriptions for toolbar icons
- Fixed menu in large screens

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*