# Engineer's Unit Converter — HVAC, AWG, Torque, Pressure

> HVAC, AWG, Torque, Pressure (iPhone/iPad app by Jose Gerardo Palma Duran.)

- Source: https://appshunter.io/ios/app/engineers-unit-converter/id6758744042 (this page in markdown: same URL + `.md`)
- Developer: [Jose Gerardo Palma Duran](https://appshunter.io/developer/1873843788)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.0 · 7 MB
- Languages: American English, Bulgarian, Croatian, Czech, Danish, Dutch, Estonian, Finnish, French (France), German (Germany) and 21 more
- Released: 2026-02-06
- Data updated: 2026-08-30
- User reviews in markdown: https://appshunter.io/ios/app/engineers-unit-converter/id6758744042/reviews.md

## What is Engineer's Unit Converter?

A unit converter built for engineering work rather than for the kitchen. Thirty-two categories, from the everyday ones to the specialist tables you normally go looking for in a handbook: AWG wire gauge, tons of refrigeration, viscosity, water hardness, radiation dose, moment of inertia.

EVERY CATEGORY, ALL FREE
Length, Area, Pressure/Stress, Mass/Weight, Energy/Work, Power, Force, Torque, Volume, Temperature, Time, Speed, Angle, Data, Frequency, Fuel Economy, Density, Flow, Viscosity, Acceleration, Electric Current, Voltage, Resistance, Electric Charge, Magnetic Flux Density, HVAC Cooling, Water Hardness, Radiation Activity, Radiation Dose, Radiation Equivalent Dose, Moment of Inertia, Wire Gauge.
No unlocks, no ad to watch first, no timer. Every category above is open the moment you install.

ENGINEERING TOOLS
An expression calculator that accepts arithmetic, fractions and scientific notation, so you can type 3/8 or 1.2e-3 straight into the field. An HVAC sizing helper that turns tons of refrigeration into BTU/h, kW and rule-of-thumb airflow. Reference tables for physical constants, thermocouple types and hardness scales.

BUILT FOR THE JOB
Works fully offline, so it does not care about signal on site. Reads decimal commas and points the way your region writes them. Pin the units you use, hide the ones you never touch, and reorder the rest. Add your own units with a conversion factor. Every conversion is kept in a searchable history you can tap to reuse. No account, no sign-in, no data leaves the device.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |



## Version history (last 5 releases)

### 1.3 — 2026-08-21

Every category is now free.

• All 32 unit categories and the engineering tools are unlocked. No ad to watch, no unlock timer.
• Now properly translated into 33 languages. Unit and category names were showing in English everywhere; they are localised throughout.
• Decimal commas and points now follow your device region. Entering 1,234 in a comma-decimal locale reads as 1.234, not 1234.
• Devanagari and Arabic-Indic digits are accepted.
• Faster category lists and search.
• History saves one entry per conversion instead of one per keystroke.
• Ad privacy options added to Settings.
• Requires iOS 18.

### 1.2 — 2026-07-04

Version 1.2 expands Engineering Units Converter for deeper engineering work.

  - Expanded to 32 conversion categories for engineering, field, and technical calculations.
  - Added search, favorites, conversion history, unit customization, and custom units.
  - Added engineering tools including an expression calculator, HVAC cooling calculator, physical constants, thermocouple data, and hardness references.
  - Improved conversion accuracy for radiation dose and equivalent dose, moment of inertia, HVAC cooling, and fuel economy edge cases.

### 1.1 — 2026-02-17

- Fixed a bug where swapping units very fast multiple times could lead to wrong behavior.
- Added a copy function to the results, just tap on the value and it will be copied to the clipboard.
- You can now change the theme manually in the settings view.
- You can now remove ads to have cleaner view.

### 1.0.1 — 2026-02-07

This version fixes a bug where under some conditions we couldn't specify negative temperatures or some absolute units could be negative values.

### 1.0 — 2026-02-06

No release notes.

## More apps by Jose Gerardo Palma Duran

- [2026 Canadian Citizenship Test](https://appshunter.io/ios/app/2026-canadian-citizenship-test/id6758591623)
- [Cooking Units: Kitchen Measure](https://appshunter.io/ios/app/cooking-units-kitchen-measure/id6758641490)
- [Group Expenses](https://appshunter.io/ios/app/group-expenses/id6758870531)
- [Mood Tracker: Daily Diary](https://appshunter.io/ios/app/mood-tracker-daily-diary/id6758899989)
- [Kiss Counter: Couple Game](https://appshunter.io/ios/app/kiss-counter-couple-game/id6758961685)

All apps by Jose Gerardo Palma Duran: https://appshunter.io/developer/1873843788

## Related topics

[engineering tool](https://appshunter.io/ios/topics/engineering-tool)

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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 2026-08-30.*