---
title: "dB Calc - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "Need to quickly convert between various RF signal measurement units? dB Calc performs lots of decibel related conversions:   Decibel / Neper / Ratio Conversions:  Enter in either the dB, Np (nepers), "
---

# dB Calc — United States
> dB / Neper / Power / Voltage

![dB Calc App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/4f/da/01/4fda01d9-94ba-45ec-bd62-9d4a521ca182/AppIcon-0-0-1x_U007emarketing-0-8-85-220.jpeg/434x0w.png)

**Developer:** [Black Cat Systems](https://apptail.io/developer/black-cat-systems-Gpc) (United States)
**Category:** Reference
**Rating:** 5.0/5 (5 ratings)
**Price:** $0.99
**Bundle ID:** com.blackcatsystems.dbCalc
**Store:** Apple App Store
**Country:** United States
**Version:** 3.0 (released 2025-07-09)
**Original Release:** 2009-01-28
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id303470503)
**AppTail Page:** [https://apptail.io/app/db-calc-vJoj/united-states](https://apptail.io/app/db-calc-vJoj/united-states)

## dB Calc Description
Need to quickly convert between various RF signal measurement units? dB Calc performs lots of decibel related conversions: 

Decibel / Neper / Ratio Conversions: 
Enter in either the dB, Np (nepers), power or voltage ratio, and the other values will be calculated.

Decibel / Power / Voltage Calculations: 
Enter in the one known value, and the others will be calculated. Select the correct units before entering in the value. You can change the units of the displayed (calculated values) by selecting the new units. Enter in the resistance before entering in the known value. 

The following units are available: 
dBmW - dB ref to 1 mW power 
dBuV - dB ref to 1 uV 
dBu - dB ref to 0.7746 V (audio) 
dBV - dB ref to 1 V 

uW - microwatts 
mW - milliwatts 
W - watts 

uV - microvolts 
mV - millivolts 
V - volts 

RMS Waveforms Conversions: 
Conversion between rms, peak, peak-peak voltage and current values for a user entered resistance. Sine, square, and triangle waveforms are supported.

Get your copy of dB Calc today, and take the hassle out of dB related conversions.

## dB Calc Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/6c/1b/44/6c1b44f6-f83e-dc01-53d5-a672e67d9e70/c0b37109-15e3-4888-b0d0-88e2a439b76a_iphone6.5-1.png/2778x1284.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/9f/f8/af/9ff8af70-06ce-0df1-81f3-ebb93d87b708/8b767721-94df-498b-acf5-de94aba2b876_iphone6.5-2.png/2778x1284.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/76/e3/45/76e345b1-e0ce-eacf-fe1c-6fbd47d66667/b89dce5a-974f-433b-8548-7e01bddc1fb8_iphone6.5-3.png/2778x1284.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/01/25/18/0125188e-1a47-fb8a-d9c4-00cc761c9aa1/46ae9dcf-3a5a-488f-8934-faf242df30b3_iphone6.5-4.png/2778x1284.png)

## dB Calc Rating Breakdown in United States
- 5 stars: 5 (100%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 stars: 0 (0%)

## dB Calc Reviews in United States

### ***** "Several year user"
Been using for five years for repeater maintainence. Quick and easy to use. An amazing range of tests and scales. I couldn’t work without it since I retired my slide rule. The battery wore out(!).
-- Good-Fortune, 2024-06-09

### ***** "Excellent tool for quick calculations"
Use the app every day and find it to be very useful and accurate.
-- The Audio Bug, 2014-08-07

### ***** "Perfect"
Use it daily.
-- Fughead, 2013-11-20

### ***** "A very useful application."
I find this application to be very useful in my day-to-day work as an RF engineer it's really quite nice.
-- Looks like my name is taken so, 2013-11-18

[View all dB Calc reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)


## dB Calc Store Rankings
| Chart | Country | Category | Rank |
|-------|---------|----------|------|
| Top Paid | Italy | Reference | #149 |
| Top Paid | Greece | Reference | #156 |
| Top Paid | Finland | Reference | #170 |
| Top Paid | Colombia | Reference | #189 |
| Top Paid | Austria | Reference | #191 |
| Top Paid | Norway | Reference | #196 |
| Top Paid | Sweden | Reference | #221 |
| Top Paid | Israel | Reference | #226 |
| Top Paid | France | Reference | #229 |
| Top Paid | Mexico | Reference | #234 |
| Top Paid | Chile | Reference | #235 |
| Top Paid | Ukraine | Reference | #236 |
| Top Paid | South Korea | Reference | #242 |
| Top Paid | Spain | Reference | #247 |


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## dB Calc Available In
- [United States](https://apptail.io/app/db-calc-vJoj/united-states)
- [Australia](https://apptail.io/app/db-calc-vJoj/australia)
- [Germany](https://apptail.io/app/db-calc-vJoj/germany)
- [Japan](https://apptail.io/app/db-calc-vJoj/japan)
- [Chile](https://apptail.io/app/db-calc-vJoj/chile)
- [Belgium](https://apptail.io/app/db-calc-vJoj/belgium)
- [France](https://apptail.io/app/db-calc-vJoj/france)
- [United Kingdom](https://apptail.io/app/db-calc-vJoj/united-kingdom)
- [Italy](https://apptail.io/app/db-calc-vJoj/italy)
- [Netherlands](https://apptail.io/app/db-calc-vJoj/netherlands)
- [New Zealand](https://apptail.io/app/db-calc-vJoj/new-zealand)
- [Canada](https://apptail.io/app/db-calc-vJoj/canada)
- [Switzerland](https://apptail.io/app/db-calc-vJoj/switzerland)
- [Hong Kong SAR China](https://apptail.io/app/db-calc-vJoj/hong-kong)
- [Hungary](https://apptail.io/app/db-calc-vJoj/hungary)
- [Indonesia](https://apptail.io/app/db-calc-vJoj/indonesia)
- [Ireland](https://apptail.io/app/db-calc-vJoj/ireland)
- [Israel](https://apptail.io/app/db-calc-vJoj/israel)
- [India](https://apptail.io/app/db-calc-vJoj/india)
- [South Korea](https://apptail.io/app/db-calc-vJoj/south-korea)
- [Kazakhstan](https://apptail.io/app/db-calc-vJoj/kazakhstan)
- [Lebanon](https://apptail.io/app/db-calc-vJoj/lebanon)
- [Sri Lanka](https://apptail.io/app/db-calc-vJoj/sri-lanka)
- [Lithuania](https://apptail.io/app/db-calc-vJoj/lithuania)
- [North Macedonia](https://apptail.io/app/db-calc-vJoj/north-macedonia)
- [Mali](https://apptail.io/app/db-calc-vJoj/mali)
- [Mexico](https://apptail.io/app/db-calc-vJoj/mexico)
- [Nigeria](https://apptail.io/app/db-calc-vJoj/nigeria)
- [Peru](https://apptail.io/app/db-calc-vJoj/peru)
- [Philippines](https://apptail.io/app/db-calc-vJoj/philippines)
- [Pakistan](https://apptail.io/app/db-calc-vJoj/pakistan)
- [Poland](https://apptail.io/app/db-calc-vJoj/poland)
- [Portugal](https://apptail.io/app/db-calc-vJoj/portugal)
- [Romania](https://apptail.io/app/db-calc-vJoj/romania)
- [Saudi Arabia](https://apptail.io/app/db-calc-vJoj/saudi-arabia)
- [Sweden](https://apptail.io/app/db-calc-vJoj/sweden)
- [Slovakia](https://apptail.io/app/db-calc-vJoj/slovakia)
- [Senegal](https://apptail.io/app/db-calc-vJoj/senegal)
- [Suriname](https://apptail.io/app/db-calc-vJoj/suriname)
- [Ukraine](https://apptail.io/app/db-calc-vJoj/ukraine)
- [United Arab Emirates](https://apptail.io/app/db-calc-vJoj/united-arab-emirates)
- [Vietnam](https://apptail.io/app/db-calc-vJoj/vietnam)
- [Armenia](https://apptail.io/app/db-calc-vJoj/armenia)
- [Austria](https://apptail.io/app/db-calc-vJoj/austria)
- [Azerbaijan](https://apptail.io/app/db-calc-vJoj/azerbaijan)
- [Brazil](https://apptail.io/app/db-calc-vJoj/brazil)
- [Czechia](https://apptail.io/app/db-calc-vJoj/czechia)
- [Denmark](https://apptail.io/app/db-calc-vJoj/denmark)
- [Dominican Republic](https://apptail.io/app/db-calc-vJoj/dominican-republic)
- [Algeria](https://apptail.io/app/db-calc-vJoj/algeria)
- [Egypt](https://apptail.io/app/db-calc-vJoj/egypt)
- [Finland](https://apptail.io/app/db-calc-vJoj/finland)
- [Grenada](https://apptail.io/app/db-calc-vJoj/grenada)
- [Greece](https://apptail.io/app/db-calc-vJoj/greece)

---

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