Car Audio Toolbox: Calculator

Car Audio Toolbox is an offline-first calculator and reference app built for car audio installers and DIY enthusiasts. No sign-in, no internet required for any calculation — every formula runs entirely on your device. ELECTRICAL & POWER CALCULATORS • Amplifier Power Calculator — estimate RMS power output from voltage, current draw, and amplifier class • Wire Gauge Calculator — find the right AWG for your amp's power and ground wiring • Fuse Size Calculator — size a fuse that protects your wire, not just your amp • Ohm / Impedance Load Calculator — series, parallel, and series-parallel speaker wiring • Amplifier Gain Setting Calculator — a calculated starting point before fine-tuning with a meter • Voltage Drop Calculator — check real-world voltage drop for a chosen wire run • Battery Runtime Calculator — estimate runtime for AGM or lithium battery banks BOX DESIGN CALCULATORS • Sealed Box Volume Calculator — net internal volume from your box dimensions • Ported Box Volume Calculator — net volume accounting for port displacement • Port Length Calculator — tune a round or slot port to your target frequency • Slot Port Area Calculator — check port area against a port-noise guideline REFERENCE & LEARNING • Speaker & Subwoofer Wiring Diagrams — series, parallel, and dual-voice-coil configurations • Car Audio Glossary — 30+ plain-language definitions, from RMS to Xmax • Troubleshooting Guide — step-by-step checks for no-power, no-sound, and noise issues • Installation Checklist — a phase-by-phase safety checklist for your next install WHY CAR AUDIO TOOLBOX • Works completely offline — every calculator runs on-device • No account, no sign-up required • Clear assumptions and safety notes on every result, not just a bare number • Light, dark, and system theme support • Built for both first-time installers and experienced enthusiasts Car Audio Toolbox is a planning and reference tool. Always confirm critical specs like fuse ratings and wire gauge against your equipment's manual, and have complex installs reviewed by a qualified installer. Have feedback or a formula suggestion? We're actively improving the app — your input shapes what gets built next.