All calculators
Each tool uses the same typed engine and a Metric/Imperial toggle. Metres are native; feet are one click away. Screen diagonals stay in inches.
Screens & projection
Viewing distance, throw, aspect ratio, brightness, viewing angle and pixel pitch.
Screens & projection
Pixel Pitch and Retina Distance Calculator
Find pixel pitch and the distance at which 4K (or 1080p) pixels hit 1 arc-minute visual acuity.
Screens & projection
Projector Brightness (Foot-Lamberts) Calculator
Estimate on-screen foot-lamberts and nits from lumens, screen gain and image area. Compare with cinema and HDR targets.
Screens & projection
Projector Throw Distance Calculator
Turn a throw-ratio pair and screen size into the minimum, maximum and mid-zoom mounting distance.
Screens & projection
Screen Size to Aspect Ratio Converter
Convert a diagonal and aspect ratio into width, height and area for 16:9, Scope or 4:3 masking.
Screens & projection
Screen Viewing Distance Calculator
Convert a screen diagonal into THX 40° and SMPTE 30° seating distances. Inches on the diagonal; metres (or feet) to the seat.
Screens & projection
Ideal Viewing Angle Calculator
Get horizontal and vertical field of view from image size and seating distance. Compare with THX 40° and SMPTE 30°.
Speaker placement & acoustics
Stereo triangle, Atmos ceiling angles, first reflections, room modes and panel coverage.
Speaker placement & acoustics
Acoustic Panel Coverage Estimator
Estimate how many panels you need from room size, target wall coverage and panel area. Cinema rooms often want 20–40%.
Speaker placement & acoustics
Dolby Atmos Ceiling Speaker Angle Calculator
Convert ceiling height and elevation angles into front and rear overhead offsets from the main seat.
Speaker placement & acoustics
First Reflection Point (Mirror Trick) Finder
Estimate side-wall and ceiling first-reflection locations from speaker, seat and room geometry — the calculator version of the mirror trick.
Speaker placement & acoustics
Room Modes / Standing Wave Calculator
Map the first axial modes from length, width and height. Speed of sound 343 m/s. Then plan subs and treatment.
Speaker placement & acoustics
Home Theater Seating Riser Height Calculator
Estimate second-row riser height so the rear seat sees over the front row, from row distances and head clearance.
Speaker placement & acoustics
Stereo Speaker Equilateral Triangle Setup
Turn listening distance into speaker separation for an equilateral stereo triangle, plus a 30° toe-in starting angle.
Speaker placement & acoustics
Subwoofer Room Gain Estimator
Rough in-room bass lift from room volume and how many boundaries the sub sees. Add it to an anechoic SPL.
Amplification & power
Amp matching, speaker wire gauge, AVR heat, conditioners and Ohm’s-law rack load.
Amplification & power
Amplifier Power Match (SPL) Calculator
From speaker sensitivity, distance and target SPL, get required watts and whether a receiver can supply them with headroom.
Amplification & power
AV Receiver Heat Dissipation Calculator
Estimate heat in watts and BTU/h from idle draw, load and efficiency, then a starting ventilation gap.
Amplification & power
Ohm’s Law AV Rack Load Calculator
Convert rack watts and wall voltage into amps and check the 80% continuous-load breaker rule.
Amplification & power
Power Conditioner Sizing (VA/Watts) Calculator
Sum display, AVR, sources and extras, then add 25% headroom for a conditioner or UPS VA rating.
Amplification & power
Speaker Wire Gauge (AWG) Distance Calculator
Pick a minimum AWG so round-trip copper stays under 5% of the speaker impedance on your cable run.
Signal, cables & storage
HDMI bandwidth, cable capacitance, audio delay, Plex storage and STC estimates.
Signal, cables & storage
Audio Delay Time Calculator
Convert a path-length difference into milliseconds and 48 kHz samples for DSP speaker delay.
Signal, cables & storage
Audio Cable Capacitance / Treble Loss Estimator
Model a long RCA/XLR run as an RC low-pass: f-3dB and loss at 20 kHz from pF/m, length and source impedance.
Signal, cables & storage
HDMI Bandwidth Calculator
Estimate video Gbit/s from resolution, refresh, bit depth, chroma and blanking. See if HDMI 2.0 TMDS (~14.4) or 2.1 (48) is enough.
Signal, cables & storage
Plex / Media Server Bitrate to Storage Size
Convert video bitrate and hours of library into gigabytes and terabytes. 1 Mbit/s for 1 hour is 0.45 GB.
Signal, cables & storage
Soundproofing STC Estimator
A mass-law-ish STC estimate from surface mass and an air gap. Higher STC, quieter neighbours — bass still leaks.
TV mounting & DIY
Wall-mount height, VESA, TV-to-wall proportion, Helmholtz traps, rack U-space and boundary gain.
TV mounting & DIY
AV Rack U-Space Calculator
Sum AVR, disc, network and extras in rack units, add ventilation U, and round up the cabinet size.
TV mounting & DIY
Blackout Paint Light Reflectance Value Estimator
Estimate remaining bounce light from paint LRV and how many wall bounces, then a crude contrast-gain factor.
TV mounting & DIY
Helmholtz Resonator DIY Frequency Calculator
Tune a ported cavity to a room-mode frequency: f = (c/2π) √(A / (V L_eff)) with end correction.
TV mounting & DIY
Subwoofer Quarter/Eighth Space Placement Estimator
Add 0, 6, 12 or 18 dB of theoretical boundary gain for free, half, quarter or eighth-space sub placement.
TV mounting & DIY
TV Size vs Wall Size Proportion
Compare TV width to wall width. A balanced look often lands between 45% and 85% of the wall.
TV mounting & DIY
TV Wall Mount Height (Eye-Level) Calculator
Place the TV centre at seated eye height, with an optional downward offset for a theater recline.
TV mounting & DIY
VESA Mount Weight and Leverage Compatibility
Check that the TV’s VESA pattern fits the mount and that the panel mass is under the mount rating.