• PAcalculate, free calculator app for mobile phones and tablets

    PAcalculate is a free multi-platform multi-lingual app with calculators, useful reference information and utilities developed for sound reinforcement and lighting professionals. It can be used on smartphones and tablets. Languages include English, French, German, Italian, Portuguese, Russian, Chinese (simplified) and Spanish. And no bothersome bandwidth eating ads.

    With PA well as lighting related calculators, comprehensive options are provided as well as built-in help. Other calculators are not directly related to the industry, but will nonetheless be useful: Ohm's / Joule's Law, KVA, BPM to time and conversion of weighs and measures. In addition to calculators, pin assignment information is provided for some of the most common audio and lighting connectors. Lastly, inclinometer and adaptable torch/light utilities round up the feature set.

    The application uses responsive design; depending on the specific device, calculator or utility, horizontal use may sometimes be a good option.

    We hope you find this tool useful. It is light (around 2 MB) so you can keep it installed for future use, as it does not work in the background (it does not stay resident, so it will not slow your phone down).

    • Calculators
      • Audio
        • Acoustics
          • SPL, SPL addition
          • Ceiling speaker coverage
          • Air absorption
          • Time «» distance
          • Frequency «» wavelength

        • Arrays
          • End-fire array
          • Line Array transition distance

        • Audio electronics
          • dBu «» dBV «» V
          • Q factor «» bandwidth
          • Limiter threshold / times
          • Amplifier gain

        • Cabling
          • Speaker cable, low impedance
          • Speaker cable, 70/100V


      • Lighting
        • DMX
        • RBG / RGBW /RGBW
        • CMY

      • Electricity
        • Ohm's Law / Joule 's Law
        • KVA

      • Music / recording
        • BPM » time
        • Tecording time
        • Note » Hz

      • Weighs and measures
        • Weight, length, area and volume


    • Reference
      • Pin assignments
        • Audio
          • XLR, 1/4”, SpeakON, DB25

        • Lighting
          • XLR3, XLR5


      • Graphs
        • Equal loudness contours (aka Fletcher&Munson)
        • Microphone polar patterns


    • Utilities
      • Inclinometer
      • Flashlight / selectable light




    Plataforms

    • Android: Link. Can be moved to SD card, though it is very light
    • iOS/iPadOS (iPhone, iPad, iPod-touch): Link
    • Windows-Phone: WP 8 (version equal or higher than 8.10.14219.0 is needed for 8.1) and Windows 10 Mobile. Link. Currently frozen at v1.2.4, which might have to be the latest WP version


    The app has been developed by José Brusi for Doctor ProAudio. On iOS store the app is under his name.


    ¡¡or simply search for PAcalculate in the app store of your phone or tablet!!

    or use this QR code:


  • Ad

  • News

    ISE postponed to June 2021

    MUNICH 15 SEPTEMBER 2020: After a period of consultation with the industry and the impact of the ongoing pandemic, Integrated Systems Events announce that ISE, scheduled for 2-5 February, has been postponed and will... Read more

    QSC Announces New Q-SYS Core Processors

    QSC has launched two new audio, video, and control processors native to the Q-SYS Ecosystem – the smaller Q-SYS Core 8 Flex and Q-SYS Core Nano. Driven by the proliferation of networked endpoints and the expanding... Read more

    Verlinde launches Stagemaker SL5 and SlL0 chain hoists

    Verlinde has announced the widening of its new range of Stagemaker electric chain hoists dedicated to the entertainment industry. The new Stagemaker SL5 and SL10 models with their load capacity... Read more

    Pliant MicroCom XR intercom system

    Pliant Technologies has launched its MicroCom XR intercom system, that provides full-duplex, multi-user intercom solutions for applications where... Read more
  • Recent articles

    Parallel and series connections: description and calculations

    In this article we'll explain impedance calculations as simply as possible, as well as describe the different types of connection.... Read more

    Loudspeaker impedance

    Measured in ohms (symbol, Ω, upper case Greek letter omega), electrical impedance is defined as the opposition to the flow of alternating current by means of presenting an electrical load. In a loudspeaker, impedance varies with frequency, so manufacturers often publish "impedance curves" showing impedance with frequency for passive units. These curves give us... Read more

    Balanced and unbalanced connections

    There are two basic ways to carry an electrical audio signal.


    • The first one is unbalanced. The signal is carried on a two-conductor cable. Unbalanced signal connectors have two pins, such as the RCA (also called Phono and Cinch, commonly used by home hi-fi equipment) and the unbalanced 1/4" (used in musical instruments and semi-professional audio). Multi-pin connectors can also carry
    ... Read more
  • PAcalculate app