# 4-20 Temperature Calculator — Temperature to current scaling

> Converts 4-20 mA signals to temperature and vice versa for industrial use. (iPhone/iPad app by Mantas Kamarauskas.)

- Source: https://appshunter.io/ios/app/4-20-temperature-calculator/id1602351736 (this page in markdown: same URL + `.md`)
- Developer: [Mantas Kamarauskas](https://appshunter.io/developer/975306268)
- Category: Utilities, Productivity
- Price: Free
- Rating: 3.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 15.6 · 30 MB
- Languages: American English
- Released: 2021-12-29
- Data updated: 2026-06-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/4-20-temperature-calculator/id1602351736/reviews.md

## What is 4?

4-20 Temperature Calculator is a practical tool for engineers, technicians, and field service professionals working with 4-20 mA transmitters.

Use it to quickly convert:
• 4-20 mA to temperature
• Temperature to 4-20 mA

The app helps you work faster in the field by giving you a simple and accurate way to check transmitter scaling, verify loop values, and troubleshoot signal readings.

Key features:
• Two-way conversion between current and temperature
• Custom min/max process range
• Support for negative temperature ranges
• Celsius and Fahrenheit input/output
• Fast, clean interface for everyday use
• Useful for HVAC, process control, maintenance, and commissioning work

Whether you are calibrating a transmitter, checking a loop, or validating process values, 4-20 Temperature Calculator gives you the numbers you need in seconds.

## Key features

- Two-way current to temperature conversion
- Custom min/max process range
- Support for negative temperatures
- Celsius and Fahrenheit support
- Fast and clean interface


## Frequently asked questions about 4

### What does 4-20 Temperature Calculator do?

4-20 Temperature Calculator converts between 4-20 mA current signals and temperature readings. It helps engineers and technicians quickly check transmitter scaling and troubleshoot signal issues.

### Is 4-20 Temperature Calculator free to use?

Yes, 4-20 Temperature Calculator is available for free. It does not have any in-app purchases or advertisements.

### What temperature units does 4-20 Temperature Calculator support?

The app supports both Celsius and Fahrenheit for input and output, making it versatile for different regional standards.

### Can 4-20 Temperature Calculator handle negative temperatures?

Yes, 4-20 Temperature Calculator supports negative temperature ranges, which is crucial for certain industrial processes.

### What devices is 4-20 Temperature Calculator compatible with?

4-20 Temperature Calculator is compatible with iPhones, iPads, and iPods.

### How often is 4-20 Temperature Calculator updated?

The latest version, 2.0, was released on March 13, 2026, indicating recent development activity. The app was first released on December 29, 2021.

### What is the user rating for 4-20 Temperature Calculator?

The app has a rating of 3.0 stars based on 2 user reviews.

### Who developed 4-20 Temperature Calculator?

4-20 Temperature Calculator was developed by Mantas Kamarauskas.

## Version history (last 5 releases)

### 2.0 — 2026-03-13

Version 2.0 brings a cleaner and more polished calculator experience.

What’s new:
• Updated interface for faster day-to-day use
• Improved 4-20 mA to temperature and temperature to 4-20 mA workflow
• Easier process range setup with custom min/max values
• Better support for Celsius and Fahrenheit conversions
• General stability and usability improvements

### 1.5 — 2023-11-09

Bug fix related with negative number entering

### 1.2.0 — 2023-11-06

Improved design
Interstitial ads

### 1.0.12 — 2021-12-31

bug fixed: ad banner problem (was not loading)
bug fixed: min max temperature keyboard (there were no negative number sign '-')

### 1.0.10 — 2021-12-29

No release notes.

## Apps similar to 4

| App | Rating | Price | Category |
| --- | --- | --- | --- |
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| [Temperature Thermometer App](https://appshunter.io/ios/app/temperature-thermometer-app/id1617617056) | 1.5 (1,305) | Free | Utilities |

## More apps by Mantas Kamarauskas

- [PRIORITIZE123](https://appshunter.io/ios/app/prioritize123/id1602665713)
- [My 30 days challenge](https://appshunter.io/ios/app/my-30-days-challenge/id1603257090)
- [Via Villam](https://appshunter.io/ios/app/via-villam/id1638309041)
- [Time Sage](https://appshunter.io/ios/app/time-sage/id6466698335)
- [House Ledger 3](https://appshunter.io/ios/app/house-ledger-3/id6470920106)

All apps by Mantas Kamarauskas: https://appshunter.io/developer/975306268

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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.*