Advanced options
Comprehension studies suggest most people follow fine up to ~1.5-2x on familiar genres, less on dense material. Narration is recorded around 150 words per minute vs the ~250 of silent reading, which is why speeding up feels natural. Work up gradually: 2x sounds absurd on day one and normal in a fortnight.
What The Audiobook Speed Calculator Works Out
- This book takes: the running time divided by the playback speed, with the time saved against 1.0x. Narration is deliberately slow, recorded around 150 words a minute against silent reading's 250-plus, so 1.5x restores roughly a reading pace and turns a ten-hour book into six hours forty.
- Days to finish: the sped-up running time divided by your daily listening, rounded up to whole sessions. A half-hour commute gets through a ten-hour book at 1.5x in a fortnight.
- Books per year: how many books of this length your yearly listening covers at this speed. The same half-hour commute at 1.5x finishes about 27 ten-hour books a year.
- Custom speed (advanced): any speed the app offers, including the 1.1x and 1.2x steps that make a slow narrator sound normal, or the 3x that long-time listeners use on familiar genres. The research is broadly reassuring up to the 1.5x to 2x band for familiar material; dense non-fiction, heavy accents and unfamiliar names argue the dial back down.
- Listening days per week (advanced): if you only listen on commuting days or at the gym, the finish stretches across more calendar days than listening sessions.
- Already listened (advanced): hours of the book already played (at 1.0x, as the app's progress bar shows), so the days-to-finish and finish date cover only what is left.
- You will finish on (advanced): the calendar date you reach the end, starting today, handy for timing a book-club deadline or a library loan expiry.
- Length in words and pages (advanced): hours times 60 times the narration pace, with an equivalent in 300-word paperback pages. A ten-hour audiobook is roughly 90,000 words, a standard novel; a 40-hour epic is the length of a fat fantasy doorstop.
- Effective reading pace (advanced): narration words per minute times playback speed, compared with silent reading at about 250 words a minute. 1.5x on a 150 wpm narrator lands almost exactly at reading pace, which is why it feels like correction rather than cheating.
- Cost per listening hour (advanced): the price or subscription credit (typically GBP 7 to GBP 8 a credit) divided by the hours you will actually spend listening. Credits price long and short books identically, so spending them on 40-hour epics is the folk strategy; libraries stream audiobooks free through their apps, with waiting lists as the price.
- Speed comparison table (advanced): running time, days to finish, books a year and words a minute at every common speed from 1x to 3x, with yours highlighted. Modern apps time-stretch without pitch-shifting, so the chipmunk era is over; the adaptation curve is a fortnight at 1.25x making 1.5x transparent and 1.0x subsequently unbearable.