Audiobook Speed Calculator: Optimize Listening Time and Efficiency

Use the Audiobook Speed Calculator to see exactly how long a book will take at any speed. Enter the original length, pick or set a speed, then press “Calculate.” The tool applies $$T_{new}=rac{T_{orig}}{S}$$ to show new duration and time saved. Audible lets listeners choose 0.5–3.5× speed (Audible Help Center, 2023).