# Hydraulic-Calculator

> Hydraulic engineering calculations for cylinders, pumps, lines, and orifices. (iPhone/iPad app by Zanthic Automation Inc..)

- Source: https://appshunter.io/ios/app/hydraulic-calculator/id612615039 (this page in markdown: same URL + `.md`)
- Developer: [Zanthic Automation Inc.](https://appshunter.io/developer/574695320)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Rating: 4.20/5 from 16 App Store ratings · 8 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.1 · 24 MB
- Languages: American English
- Released: 2013-03-15
- Data updated: 2026-06-04
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/hydraulic-calculator/id612615039/reviews.md

## What is Hydraulic?

The Hydraulic Calculator includes many basic hydraulic calculations.  

Cylinder calculations can be done to solve for extension / retraction forces or speeds.

Pump calculations can also be done by entering combinations of displacement, oil flow and pressure to determine values for speed, torque and power.  Both mechanical and volumetric efficiencies can be used in these calculations.

Hydraulic line calculations can also be done for fluid velocity, cross sectional area, Reynolds number and pressure drop.  The free version is limited to 1” or 25mm line diameters.

Orifice calculations can also be made using three parameters: Oil Flow, Orifice Diameter and Pressure Drop.  Enter any two values and have the third calculated.

Speed - Torque - Power page: Enter any two values have the third calculated. Unit conversions built into the page. 

Calculations can be done in either metric or imperial units.  Basic unit conversions are also available.

With the in-app purchase, all features from the Hydraulic Calculator will become active:

Cylinder characteristics can be entered in a number of different ways. Enter hydraulic flow, cylinder velocity, or stroke time and calculate the other two. User can also enter Hydraulic pressure, extend force or retract force and have the other two calculated. 

One application for this is to measure the stroke time of a cylinder. By entering this with the bore diameter and stroke length, the system flow is calculated. 

Full motor & pump calculation page. The motor & pump calculator are flexible tools in which the user can enter any three known values to have the remaining values calculated. Values include: displacement, oil flow, pressure, rotational speed, torque, and motor power. Both mechanical and volumetric efficiency values are used. 

Results can be copied to the clipboard in a text format for use in e-mails, messages, or other documentation.

## Key features

- Cylinder force and speed calculations
- Pump displacement, flow, and pressure calculations
- Hydraulic line fluid velocity and pressure drop
- Orifice flow and pressure calculations
- Speed, torque, and power calculations
- Metric and imperial unit support
- Copy results to clipboard

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Full Version | $7.99 | one-time |
| Pro Version | $7.99 | one-time |


## Recent user reviews (8 of 8)

All indexed reviews: https://appshunter.io/ios/app/hydraulic-calculator/id612615039/reviews.md

### 2/5 — Paid for, now it doesn’t work

*2026-03-10, version 2.5*

Used this app for years weekly if not daily, paid to unlock features like pump/motor efficiencies and since either my new phone (iPhone 16pro max) or latest iOS the paid for features no longer work. No app updates, tried to delete and reload then restore the purchase with no success.

### 1/5 — Not free

*2025-06-29, version 2.3*

Useless without paying.

### 4/5 — Handy App - 1 Suggestion

*2021-04-15, version 2.3*

Nice app, easy to use and pretty comprehensive. One suggestion would be to allow the user to switch units on the fly. Essentially, either while inputting the value or reading the result the user could simply tap and change the units. For example tap the units for pressure and change from psi to bar. I regularly work with vendors overseas and customers in the US. Conference calls are fun when the vendor tells me the the displacement in ccm and the customer is telling me the pressure in PSI and everyone is asking about the motor’s torque output. Of course they want the answer in ft-lbs and Nm.

### 5/5 — Very Handy

*2020-03-10, version 2.3*

Awesome app!

### 1/5 — Not Free ?

*2019-12-12*

Looks like a forgotten app, looks like it would have been great but unfortunately it says Free app but when you click on certain things it says you must purchase the app in a link that does not appear to be linked to anything.  The power unit app produced by the same company seems to work great! 

Lots of other free calculators, I might have purchased this one as it appears to have lots of great functions. Deleted

### 4/5 — Hydraulic calculator

*2016-10-24, version 2.3*

Very handy onsite tool

### 5/5 — Fantastic

*2016-05-12, version 2.3*

I've had this app for about 2 or 3 years and I use it several times a week in the course of my job. 
I do functional integration of industrial hydraulic systems. Being able to quickly calculate the required HP for a system is invaluable when you're running a new and untested system (contrary to beliefs, engineers constantly fail to do this when specs are made and a unit will be underpowered or over worked). 
I also have two other hydraulic apps from these guys and I guarantee you'll love them if you're around hydraulics and need quick calculations. 

Can't recommend them highly enough and I've even had my company's monthly newsletter include screenshots and info regarding these apps so all the employees are aware of how useful they are in our profession.

### 1/5 — Don't waste your download data on this

*2015-08-15, version 2.2*

Don't waste your download data on this

## Frequently asked questions about Hydraulic

### What hydraulic calculations can Hydraulic-Calculator perform?

Hydraulic-Calculator offers basic calculations for cylinders (force, speed), pumps (displacement, flow, pressure), hydraulic lines (velocity, pressure drop), and orifices (flow, pressure). The full version unlocks more advanced cylinder and pump calculations.

### Does Hydraulic-Calculator support both metric and imperial units?

Yes, Hydraulic-Calculator allows calculations to be performed in either metric or imperial units. Basic unit conversions are also built into the application for convenience.

### How can I access all features of Hydraulic-Calculator?

All features of Hydraulic-Calculator can be unlocked with a one-time in-app purchase. This purchase activates advanced calculations for cylinders and pumps, including detailed motor and pump calculations.

### Can I share my calculation results from Hydraulic-Calculator?

Yes, results from Hydraulic-Calculator can be easily copied to the clipboard in a text format. This allows you to share them via emails, messages, or other documentation.

### What devices is Hydraulic-Calculator available on?

Hydraulic-Calculator is available for iPhone and iPad devices. It is designed for users who need hydraulic calculations on the go.

### How often is Hydraulic-Calculator updated?

The latest version of Hydraulic-Calculator is 2.5, last updated on November 24, 2025. This indicates the app is actively maintained by the developer.

### What is the user sentiment for Hydraulic-Calculator?

Hydraulic-Calculator has a rating of 4.2 stars from 16 ratings, suggesting generally positive user satisfaction with its functionality and utility.

### Is Hydraulic-Calculator suitable for beginners?

With its clear interface and basic calculations, Hydraulic-Calculator can be useful for beginners learning about hydraulics. The in-app purchase unlocks more complex features for advanced users.

## Version history (last 5 releases)

### 2.5 — 2025-11-24

- Unit Conversions : Add Power, Volume, Temperature Conversions.
- Liner Interpolation.
- Hex/Decimal.
- Voltage-Current-Resistance

### 2.4 — 2025-10-18

New design for a better user experience and a modern look.

### 2.3 — 2016-03-22

This app has been updated by Apple to display the Apple Watch app icon.

- Support for iOS 9.2.1
- UI fixes
- Miscellaneous bug fixes

### 2.2 — 2014-02-12

- Reynolds Calculation corrected.
- Added oil density 0.9 SG to the calculation

### 2.1 — 2014-01-05

iOS 7 UI support added

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## More apps by Zanthic Automation Inc.

- [Free Hydraulic Cylinder Calculator](https://appshunter.io/ios/app/free-hydraulic-cylinder-calculator/id601253431)
- [Hydraulic Power Unit](https://appshunter.io/ios/app/hydraulic-power-unit/id608111471)
- [Pneumatic Cylinder](https://appshunter.io/ios/app/pneumatic-cylinder/id620275578)
- [Dive Calculator](https://appshunter.io/ios/app/dive-calculator/id831751437)

All apps by Zanthic Automation Inc.: https://appshunter.io/developer/574695320

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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 2026-06-04.*