# PAcalculate — The sound reinforcement app! > Professional audio and lighting calculators and reference tool. (iPhone/iPad app by Jose Brusi.) - Source: https://appshunter.io/ios/app/pacalculate/id793460437 (this page in markdown: same URL + `.md`) - Developer: [Jose Brusi](https://appshunter.io/developer/793460440) - Category: Utilities - Price: Free - Rating: 5.00/5 from 7 App Store ratings · 3 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 3 MB - Languages: English - Released: 2014-01-23 - Data updated: 2026-06-08 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/pacalculate/id793460437/reviews.md ## What is PAcalculate? 28 calculators (47 calculations) for pro-audio sound reinforcement and lighting, as well as reference info and utilities. A super handy tool for people dealing with PA, sound reinforcement, sound systems, electro-acoustics, pro-audio and lighting Acoustics - SPL (sound pressure level) - SPL sum with phase, distance or time difference - Air absorption attenuation for a given humidity, temperature, frequency and distance - Ceiling speaker coverage - Time «» Distance - Audio frequency «» Wavelength (includes lambda/2 and 2*lambda/3 for line arrays or subwoofer arrays) - Transition distance for line arrays (near to far field) - End-fire and broadside array subwoofer modelling Audio electronics - dBu «» dBV «» Volts - Q «» B/W (bandwidth) - Limiter threshold, attack&releases times - Amplifier gain Cabling - Speaker cable: low impedance, high impedance (constant voltage line, 70V/100V). Calculates energy and level loss, system damping factor Lights DMX channel, RGB/RGBW/RGBA and CMY Useful reference info such as pinouts (proaudio and lighting) and graphs Utilities: Inclinometer, Flashlight / light with selectable intermittence (uses camera permission) Latest news from DoctorProAudio.com ## Key features - 28 calculators for pro-audio and lighting - Acoustics calculations (SPL, air absorption) - Audio electronics calculations (dBu/dBV, Q/B/W) - Cabling calculations (speaker cable loss) - Lighting calculations (DMX, RGB/CMY) - Reference info (pinouts, graphs) ## Recent user reviews (3 of 3) All indexed reviews: https://appshunter.io/ios/app/pacalculate/id793460437/reviews.md ### 5/5 — Very handy *2022-03-23* This is a very cool little tool for audio math! Much more utility than I had expected for free! ### 5/5 — Muy buena y util *2015-07-27* Solo agregaría un botón volver a la app cuando se consulta el foro desde ella... ### 4/5 — Gran App *2014-01-30* Es de agradecer para los que trabajamos en el campo de audio y iluminación gran aporte. Es super fácil de usar y de gran utilidad. Gracias ¡¡¡ ## Frequently asked questions about PAcalculate ### What types of calculations does PAcalculate offer? PAcalculate offers 28 calculators covering acoustics, audio electronics, cabling, and lighting. This includes calculations for SPL, air absorption, speaker cable loss, and DMX channel configurations. ### Is PAcalculate suitable for beginners in audio and lighting? While the app is designed for professionals, its clear calculations and reference information can also be beneficial for beginners learning about sound reinforcement and lighting principles. ### What devices is PAcalculate available on? PAcalculate is available on iPhone, iPad, and iPod, making it accessible for a wide range of Apple users. ### How often is PAcalculate updated? PAcalculate was last updated on December 22, 2025, indicating recent development and potential for ongoing improvements and new features. ### What is the user rating for PAcalculate? PAcalculate has an excellent user rating of 5.0 stars based on 7 ratings, suggesting a high level of user satisfaction with its functionality and performance. ### Does PAcalculate have ads? No, PAcalculate does not contain advertisements, providing an uninterrupted user experience for its calculations and reference tools. ### What is the age rating for PAcalculate? PAcalculate has an age rating of 4+, making it suitable for users of all ages. ### Can PAcalculate be used offline? The app description does not specify offline functionality, but its nature as a calculator and reference tool suggests it may function without an active internet connection for most features. ## Version history (last 5 releases) ### 1.3.6 — 2026-05-26 - SPL sum calculator now allows summing with phase distance or time difference - The flashlight / light can now flash at two speeds for signalling use ### 1.3.5 — 2025-12-22 - Faster array simulators. Maps now default to 50m - Fixed inclinometer format in landscape mode - Format unchanged with virtual keyboard - You can choose a language in your phone's settings (to set one different from the phone's default) - Various minor improvements - 1.3.5 fixes inclinometer on some devices ### 1.3.4 — 2025-12-18 - Faster array simulators. Maps now default to 50m - Fixed inclinometer format in landscape mode - Format unchanged with virtual keyboard - You can choose a language in your phone's settings (to set one different from the phone's default) - Various minor improvements ### 1.3.3 — 2025-03-06 - New proyector calculator - Broadside simulator defaults to 1/4 wavelength - BPM calculator adds dot option and 1/32 crochet length - Alleviates issues with dark mode on some devices - Assorted minor improvements ### 1.3.2 — 2022-03-08 - Broadside (line) array modelling with electronic or mechanical arcing and steering as well as end-fire/gradient(cardioid) lines - Array modelling is now more insightful: provides a left/right mirror image option and 3 new graphics (isobar display, coverage map and multi-angle frequency responses) as well as a horizontal viewing mode that packs more information on the screen - Easier introduction of values below 1 in Q «» BW calculator - Fixed main menu link to news and educational content - Additional support for larger system fonts ## Apps similar to PAcalculate | App | Rating | Price | Category | | --- | --- | --- | --- | | [Tracebook - Speaker Reference](https://appshunter.io/ios/app/tracebook-speaker-reference/id6474818065) | — | Free | Utilities | | [SignalScope X](https://appshunter.io/ios/app/signalscope-x/id1304775893) | 3.0 (21) | Free | Utilities | | [On-Axis](https://appshunter.io/ios/app/on-axis/id6446842774) | 5.0 (6) | Free | Utilities | | [DM-RTA](https://appshunter.io/ios/app/dm-rta/id1445780170) | 3.2 (11) | Free | Utilities | | [FFTWave](https://appshunter.io/ios/app/fftwave/id1080227446) | 4.3 (15) | Free | Utilities | | [SoundMeter X](https://appshunter.io/ios/app/soundmeter-x/id1348050232) | 3.6 (40) | Free | Utilities | ## More apps by Jose Brusi - [Paella Infalible](https://appshunter.io/ios/app/paella-infalible/id1024252574) All apps by Jose Brusi: https://appshunter.io/developer/793460440 ## Related topics [ittf](https://appshunter.io/ios/topics/ittf) --- *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 2026-06-08.*