How this calculator works
The calculator adds the routine parts of the day when you can listen but cannot read: commuting, chores, exercise and any other standing or walking time. It scales the daily total by the days you follow that routine and by your playback speed, because a faster setting fits more audio into the same clock time. Dividing the listening time by an average episode length turns hours into episodes. The result is a count of what the same routine could cover, not a recommendation to speed up: comprehension usually falls as playback rises above about 1.5 to 2 times.
Formula
Dead time per day = travel + chores + exercise + other. Listening time per week = daily dead time x days per week x playback speed. Monthly listening time = weekly x 52 / 12. Yearly listening time = weekly x 52. Episodes = listening time / average episode length.
Worked example
Twenty minutes travelling, fifteen on chores, twenty exercising and ten waiting add up to 65 minutes a day. At normal speed that is 7 hours 35 minutes a week. At 1.5 times speed the same routine covers 11 hours 23 minutes a week, which is about 19.5 episodes of 35 minutes and roughly 1,014 episodes a year.
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Frequently asked questions
Does speeding up reduce the value of what I hear?
It can. Speech remains intelligible at higher rates because people speak more slowly than the brain can process, but complex arguments, unfamiliar names and poor audio quality become harder to follow. Keep the setting where you can still recall what was said an hour later.
Should I count exercise time?
Only if listening does not make the exercise less safe. Walking, cycling on a stationary bike or lifting weights in a gym are usually fine. Road cycling and anything that needs full attention are not.
Why are there separate audiobooks and podcast calculators?
The arithmetic is similar, but the outputs differ. Audiobooks are counted in books of a certain length, while podcasts are counted in episodes that are usually much shorter. Each page frames the numbers for its medium.
How accurate is the episode count?
It is an average. Real episodes vary from ten minutes to several hours, and some weeks have none. The count shows the scale of what your routine could cover; use the weekly hours to compare against the shows you actually follow.