Amp & Speaker Calculator

Free amp & speaker calculator: match amplifier watts, impedance (ohms), headroom & real SPL. Car audio, PA, home & studio.

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, it calculates the amplifier power you need from your SPL target, listening distance, and speaker impedance. Stop guessing. Start calculating. What it calculates: - Required wattage from your SPL target and listening distance - Load impedance per channel for single and multi-speaker setups - Parallel impedance for multiple drivers - Recommended headroom for clean, undistorted peaks - Compatibility scoring based on your application type Features: - Personalized amplifier recommendations - SPL-based power calculation using inverse square law and room gain - Impedance matching for 2-ohm, 4-ohm, and 8-ohm loads - Advanced mode for pro users: thermal limits, damping factor, and bridged configurations - Side-by-side amplifier comparison - Accessory suggestions such as speaker wire, connectors, and rack mounts - Export your results as a report or share them with your installer Works with car audio, PA and live sound, home hi-fi, guitar amps, and studio monitor setups. Install now and find the right amplifier in under 60 seconds.