Be an audio-visual pro wherever you go with AV Tools.

A simple but very useful collection of audio-visual tools and information for use when ever you need.

Additional features in AV Tools:
No Adverts
Tone Generator
DMX Address - Dip Switch Calculator
Aspect Ratio Calculator
Voltage Drop Calculator
More pinouts: Cresnet, Tec Pro, RS232, Lectriflex/Harting, Socapex and VGA.

Audio Tools
Delay calculator - A quick and easy way to convert from metres / feet to mS.
DAW disk space calculator - Want to know how many tracks you can record for your 30 minute master piece and at what sample / bit rate based on your hard drive capacity, then this is the tool for you.
SPL calculator - Simply enter amplifier power, loud-speaker sensitivity and a distance to find your maximum sound pressure level.
Impedance calculators - Calculate total loads for a group of speakers in parallel and series configurations.
Tone Generator - Select from 10 common sine wave frequencies, 20hz to 20khz sine wave sweep, pink and white noise.
dBu / dBV to voltage converter, wavelength calculator, constant voltage impedance converter (70v + 100v line), and UK radio mic frequency lists (Ch38, Ch69 and de-reg).

Video Tools
Aspect ratio calculator - Need to work out a videos aspect ratio; simply enter the dimensions and press calculate, alternatively enter one dimension and select the aspect ratio to get the second dimension.
Projection distance calculator and screen resolutions guide.

Lighting Tools
DMX address - dip switch - Simply enter the DMX address to receive the correct dip switch settings, then select an offset (Number of DMX channels your fixture requires) and use the plus and minus buttons to quickly address multiple fixtures.
Beam width calculator and Gel cuts calculator.

Power Tools
Power voltage current calculator - A simple Ohm's law based calculator.
Voltage drop calculator

Pin-outs for common audio-visual connectors

AV Tools Reviews
5 Stars - "Great Audio Tools"
5 Stars - "Wao! Just what I needed. I love it! Thanks!"
4 Stars - "Good information. Nice update for Celsius and Fahrenheit. Thank you."

What’s New

Version 2.1.0

Update for IOS 11 and iPhone X

Ratings and Reviews

OXIEnt ,

Recommended Frequencies Need Updating

I realize the app is made in the UK, but with the ability to switch to Imperial for US standards, I’d like to also see current frequency recommendations be updated as well. The 600mhz range in the states has been bought up and wireless mic systems have to migrate to over frequency locations. I think 500mhz band is not the place to go. Hoping to have this added as a huge help to my AV profession.

BoomHeadshot056 ,

Solid app

Great app for simple equations and quick results. Love the pinout section. Would be great to add a few other connectors like speakon NL2, 4 & 8. Also, wiring from different connectors (TRS-XLR etc.)

iThinkergoiMac ,

Excellent - Could Use More Custom Options

This app is very well done! It provides a ton of information and is very well laid out. As far as I can tell, all the information as accurate.

I do wish I could specify some custom settings, especially in the tone generator and aspect ratios. The tone generator has presets but I can't set a specific frequency. Likewise I can't specify a custom aspect ratio, though it will tell me what the AR is of any given size.


Dan Sullivan
6.5 MB
Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2016 Dan Sullivan


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.