Audio, Video & Photography calculators
Choose a task below. Check each calculator’s assumptions and units before using its result.
Free Subwoofer Box Volume Calculator
Calculate optimal sealed enclosure volume, ported box internal volume, tuning frequency (Fb), and port tube dimensions to eliminate chuffing.
Free Subwoofer Delay & Phase Alignment Calculator
Calculate acoustic latency delay (ms), physical distance offset, phase angle at crossover, and polarity inversion to stop destructive bass cancellation.
Free Subwoofer Port Air Velocity & Chuffing Calculator
Calculate peak resonant air velocity (m/s and Mach number) inside bass reflex ports to eliminate chuffing and turbulent wind noise.
Free Tape Delay & Reel-to-Reel Speed Calculator
Calculate exact echo delay times (milliseconds and tempo subdivisions) from tape speed (IPS) and record-to-playback head spacing.
Free Telescope Magnification Calculator
Calculate magnification, true field of view (TFOV), exit pupil in millimeters, and focal ratio to choose the perfect eyepiece.
Free Video Bitrate Calculator
Calculate exact video and audio bitrate to meet Discord, X, and web file limits.
Guitar Pickup Resonant Peak & Cable Capacitance Calculator
Model your electric guitar pickup as an RLC circuit. Calculate high-end resonant peak frequency (kHz), Q boost, and cable capacitance tone roll-off.
HLS Segment Bitrate & CDN Bandwidth Calculator | AnythingOnline
Free HLS and DASH streaming bitrate calculator. Calculate segment chunk size in MB, player buffer duration, and CDN egress bandwidth in Mbps and TB/month.
HVAC Duct Silencer Calculator - Acoustic Insertion Loss
Determine dynamic insertion loss (DIL) across 63 Hz to 8,000 Hz octave bands, airflow face velocity, aerodynamic static pressure drop, and regenerated self-noise.
LUFS Loudness Normalization & True Peak Gain Calculator | AnythingOnline
Free LUFS loudness normalizer calculator. Compute gain adjustment and True Peak clipping prevention for YouTube (-14 LUFS), Spotify, Apple Music, Podcasts, and EBU R128.
Microphone Distance & Inverse Square Law Calculator
Calculate acoustic SPL drop with distance via the Inverse Square Law, multi-mic 3:1 bleed phase rule, and cardioid proximity bass boost.
ND Filter Calculator - Long Exposure Shutter Speed
Calculate adjusted long exposure shutter speeds when mounting Neutral Density (ND) filters for smooth water, moving clouds, and cinematic video.
Room Reverberation Time RT60 Calculator - Sabine Acoustic
Determine room acoustic decay time in seconds using classic Sabine and Eyring formulas, calculate total room absorption in Sabins, and optimize speech intelligibility.
Slow Motion Frame Rate & Conforming Speed Calculator | AnythingOnline
Free slow motion frame rate calculator. Compute playback speed %, conformed video duration, slowdown factor, and audio pitch shift for 60fps, 120fps, 240fps to 24fps timelines.
Sound Distance Attenuation Calculator - Inverse Square dB
Determine noise level reduction over distance using the acoustic inverse square law for point sources (chillers, pumps, fans) and line sources (traffic roads).
Sound Transmission Class Calculator - STC ASTM E413
Fit 1/3-octave sound transmission loss (TL) data against the ASTM E413 reference curve, enforce 8 dB maximum single deficiency rules, and determine single-number STC ratings.
Speaker Impedance Calculator - Series & Parallel Ohms
Calculate total nominal speaker load impedance in Ohms (Ω) for series, parallel, and series-parallel audio speaker cabinet configurations.
Speaker Voice Coil Thermal Power Compression Calculator
Calculate voice coil temperature rise, hot DC resistance increase, acoustic power compression loss (dB), and amplifier power wasted as heat.
Stage Lighting Throw Distance & Beam Angle Calculator
Calculate stage beam diameter spread, field angle overlap, and target illuminance (Foot-candles & Lux) across throw distance.
Studio Acoustic Early Reflection & Comb Filtering Calculator
Calculate acoustic path length difference, latency delay (ms), and destructive comb filtering notch null frequencies from side walls, desks, and ceilings.
Timelapse Calculator - Shooting Interval & Frame Count
Determine intervalometer shooting intervals, required photo counts, and memory card storage for smooth video playback.
Timelapse Interval, Frame Count & Storage Calculator | AnythingOnline
Free timelapse intervalometer and storage calculator. Calculate shooting interval in seconds, total frame count, memory card GB requirements, and SD card capacity limits.
Video Framerate Shutter Speed & 180° Rule Calculator | AnythingOnline
Free 180 degree shutter rule calculator. Calculate cinema reciprocal shutter speed fraction, exposure time in ms, and required ND filter density for 24fps, 30fps, 60fps, and 120fps.