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Settings: the Google Play link now describes the public listing. Ceiling Speaker Layout: the drawing's caption shows metres when you work in metric.
69 pro AV calculators that show the work: audio, video, rigging, RF, network.
ProAV Math is a calculator suite for A/V integrators, sound engineers, riggers and installers, and it shows the work. Every result expands to the formula, the same formula with YOUR numbers substituted in, and a numbered step-by-step breakdown with every intermediate value. Check your math, learn the why, or copy the whole derivation into a design document. No black-box answers. See exactly how the number was reached. 69 calculators in 11 groups. Every calculator is free. ACOUSTICS • Sabine RT60, and RT60 per octave band from real materials (α and NRC lookup) • Panel Placement: where speaker coverage lands on a wall, and the first reflection point • Speed of sound and HF air absorption from temperature and humidity; wavelength at your air temperature AUDIO • Delay time (temperature and humidity compensated), phase delay • Ceiling speaker layout and spacing, series / parallel and N-load impedance • 70V / 100V constant-voltage line loading with amp headroom • Amp power and SPL: the SPL you will get, or the watts to hit a target • End-fire and cardioid sub arrays DB AND LEVELS • dB calculator: volts, dBu, dBV, dBFS, dBm and dBW • Gain structure: input level to SPL through the amp • SPL at distance, dB per doubling (point vs line source), dB addition (power sum) SPEAKER CABINETS • Vented box and port tuning, port air velocity (chuffing check) • Thiele-Small box alignment, L-pad attenuator values ELECTRICAL • Ohm's law wheel, voltage drop (copper, single or three phase) • Conduit fill: THHN and AV cables in EMT, RMC or PVC against the NEC fill limit • Wire ampacity (NEC 310.16), grounding and bonding size (NEC 250.122) • Surge arrestor, ground lead surge rise, grounding method by item • Heat load: watts, BTU/hr and tons of cooling NETWORKING • PoE budget and PoE voltage drop, bandwidth budget, Ethernet distance and hops • Subnet calculator, subnet planner, VLAN / DHCP scope planner • Dante / AES67 multicast planner, PTP sync budget, traffic and failover time RACKS • Rack Builder: gear list to rack size, amps and heat, with a front elevation drawing RIGGING • Sling angle and leg tension, bridle legs, WLL and design factor, truss pick reactions, centre of gravity VIDEO • Projector throw distance, throw ratio, lens selection • Projector lamp life: change, reorder and filter dates, with add to calendar • LED wall resolution, tile count, power, data ports, viewing distance • Screen size and viewing distance LIGHTING • Beam circle at distance, DMX channel count and patch, front wash layout WIRELESS AND RF • Intermod and frequency plan, TV channel finder, antenna length, coax loss, link budget WHY INTEGRATORS USE IT • Show-the-work derivation on every calculator • Formulas cited to their source (NEC tables, acoustics references) • A note on why and when to use every calculator, search, imperial or metric units • Works offline, no account, no sign-up • Dark interface built for the field PRO (ONE-TIME PURCHASE) The calculators are free with a banner ad. A one-time Pro purchase adds: • Projects: save calculations into named jobs with client, venue and folders • PDF export: client-ready reports with the worked math, Letter or A4, your company name in the header; preview, share or save to the device • Send a project to AV Project Pro as a project file • No ads No subscriptions. Saving a calculation to a project is free; opening Projects and exporting the PDF need Pro. Field-estimate disclaimer: Results are engineering estimates to speed up planning. Always verify electrical and code-related calculations against the current NEC edition and your local authority having jurisdiction (AHJ) before installation. The rigging calculators are planning estimates only and are not a substitute for a qualified rigger, an engineered load plan or the manufacturer's rated WLL. Privacy: ProAV Math works offline and needs no account. The free version shows ads served by Google AdMob, which may use an advertising identifier; Pro removes ads.