# Power Units

> Converts power units for 50-ohm RF systems. (iPhone/iPad app by Boon Leng Cheong.)

- Source: https://appshunter.io/ios/app/power-units/id391780369 (this page in markdown: same URL + `.md`)
- Developer: [Boon Leng Cheong](https://appshunter.io/developer/391773111)
- Category: Utilities, Education
- Price: Free
- Rating: 4.60/5 from 5 App Store ratings · 6 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 16 MB
- Languages: American English
- Released: 2010-09-21
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/power-units/id391780369/reviews.md

## What is Power Units?

A power unit converter for 50-ohm systems. The Power Units is primarily designed for RF engineers, amateur radio enthusiasts and students working with power units for 50-ohm systems. With this utility, you can convert multiple power units into any others. The Power Units supports decibel power referenced to milliwatt (dBm), peak-to-peak voltage (Vpp), normal voltage (V), milliwatt (mW), watt (W) and kilowatt (kW).

## Key features

- Converts multiple power units
- Supports 50-ohm systems
- Includes dBm, Vpp, V, mW, W, kW
- Designed for RF engineers
- Useful for amateur radio enthusiasts

## Recent user reviews (6 of 6)

All indexed reviews: https://appshunter.io/ios/app/power-units/id391780369/reviews.md

### 5/5 — Handy app but need a minus sign for entry

*2022-07-12, version 1.3*

This is a great app! It would be perfect if there was a way to enter a negative number such as -120 dBm. 

Radio work sometimes needs to convert from -dBm to micro volts (uV) and the reverse. I’m sure it would be greatly appreciated if these converters were added. 

Also, others may need to change the impedance to something besides 50 ohms. 

Thank you for an excellent app!!

### 1/5 — No negative dBm

*2016-09-23*

Useless or unfinished

### 5/5 — Simple, fast, super useful tool.

*2011-05-12, version 1.1*

Very good and useful tool for everyday use. Thanks!

### 5/5 — Perfect

*2011-04-28, version 1.1*

It's simple to use, gives all the information I need in a clean, easy to read interface. I use it all the time. And at this price (free) it's a steal. 

Thank you for your work, and I look forward to seeing other projects you do.

### 5/5 — Very simple and convenient to use

*2010-10-02, version 0*

It's a very convenient, simple and good tool to use !

### 5/5 — Good app

*2010-09-21*

Does what it says on the tin.

## Frequently asked questions about Power Units

### What power units does Power Units support?

Power Units supports decibel power referenced to milliwatt (dBm), peak-to-peak voltage (Vpp), normal voltage (V), milliwatt (mW), watt (W), and kilowatt (kW).

### Is Power Units free to use?

Yes, Power Units is available for free.

### What devices is Power Units compatible with?

Power Units is designed for iPhone, iPad, and iPod devices.

### What is the age rating for Power Units?

Power Units has an age rating of 4+.

### How often is Power Units updated?

The latest version, 1.3, was released on November 6, 2017. The app has not received updates since then.

### Does Power Units have ads?

No, Power Units does not contain advertisements.

### Who developed Power Units?

Power Units was developed by Boon Leng Cheong.

### What is the primary use case for Power Units?

Power Units is primarily used for converting power units within 50-ohm systems, which is essential for RF engineers and amateur radio enthusiasts.

## Version history (last 4 releases)

### 1.3 — 2017-11-06

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

Updated for iOS 11.

### 1.2 — 2016-01-22

• UI overhaul
• Added favorite values for later recall

### 1.1 — 2010-10-13

• Added support for iOS 3.1
• Slider snaps to rounded values

### 1.0 — 2010-09-21

No release notes.

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## More apps by Boon Leng Cheong

- [Envelope Maker](https://appshunter.io/ios/app/envelope-maker/id395387654)

All apps by Boon Leng Cheong: https://appshunter.io/developer/391773111

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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 2026-06-10.*