AudioEngineerToolkit

A complete set of offline calculators for audio engineers — on stage, in the studio, no internet required. No login, no ads, no tracking. ■ Electrical · Ohm's Law calculator · Power calculator · Speaker impedance (series/parallel) · dB ↔ power ratio converter ■ Delay · Distance ↔ Time ↔ Phase · Haas Effect zone finder · Multi-zone speaker delay alignment · BPM-based reverb pre-delay ■ Acoustics · Frequency ↔ Period ↔ Wavelength ↔ Quarter-wavelength · Octave band calculator · Distance ↔ time delay · Room volume calculator · Room mode calculator · RT60 reverberation time ■ Tempo & Pitch · Tap tempo (BPM) finder · Note length calculator · Playback speed ↔ pitch converter (turntable-style) · Loop BPM finder · Bar duration calculator · Sample rate / buffer size latency calculator Keep your go-to calculators in the Favorites tab and open them in one tap. Available in Korean, English, Japanese, Spanish, Simplified Chinese, German, Brazilian Portuguese and French. Runs on iPhone, iPad and Mac.