# PAcalculate

> The calculator app for PA pros

Canonical page: [https://chrome-stats.com/d/id793460437](https://chrome-stats.com/d/id793460437)

## Overview

- **ID:** `id793460437`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Jose Brusi
- **Category:** Utilities
- **Rating:** 5.00 / 5 (7 ratings)
- **Version:** 1.3.6
- **Last updated:** 2026-05-26
- **First published:** 2014-01-23
- **Size:** 2.99 MB
- **Data as of:** 2026-09-21
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/pacalculate/id793460437)
- **Website:** [https://www.doctorproaudio.com/content.php?2082-pacalculate-app-calculators-phones&langid=1](https://www.doctorproaudio.com/content.php?2082-pacalculate-app-calculators-phones&langid=1)
- **Privacy policy:** [https://www.brusi.com/pacalculate-privacy-policy.shtml](https://www.brusi.com/pacalculate-privacy-policy.shtml)

## Description

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

## Rankings

- #375,122 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id793460437)