Amp & Speaker Calculator — Watts, Impedance, Ohms & SPL

Power Amplifier Calculator takes the guesswork out of matching amplifiers to speakers. Whether you're building a car audio system, sizing a PA rig, or upgrading your home hi-fi, this tool calculates the exact amplifier power you need based on your SPL target, listening distance, and speaker impedance. Stop guessing. Start calculating. What it calculates: • Required amplifier wattage from SPL target and room/listening distance • Load impedance per channel for single and multi-speaker setups • Recommended headroom for clean, distortion-free peaks • Compatibility scoring based on your application type • Parallel speaker impedance calculations for multiple drivers Built for every setup: • Car audio amplifier planning match head units, subwoofers, and component speakers • PA amplifier sizing calculate power for venues, events, and live sound • Home audio and hi-fi amplifier matching get the right wattage for your bookshelf, floor-standing, or satellite speakers • Guitar amplifier matching pair the right amp with your cab impedance • Acoustic and studio monitoring clean power for reference listening Features: • Personalized amplifier recommendations with real product suggestions • SPL-based power calculation using inverse square law and room gain • Impedance matching for 2-ohm, 4-ohm, and 8-ohm speaker loads • Advanced mode for pro users thermal limits, damping factor, and bridged configurations • Side-by-side amplifier comparison • Accessory suggestions speaker wire, banana plugs, rack mounts, and patch cables • Export your results as a report or share with your installer If you've ever searched for car audio amplifier calculator, PA amplifier sizing, speaker amplifier matcher, how many watts do I need, amplifier impedance calculator, or best amplifier for my speakers this tool is built for exactly that. Install now and find the perfect amplifier in under 60 seconds.