About the Quarantine Books Calculator
This tool estimates how many books you should have on hand for a quarantine, self-isolation period, hospital stay, or any stretch of time when you'll be reading to pass the hours. It works from a simple, well-established reading-math relationship: the total number of words you'll read over the period, divided by how many words a typical book contains.
The formula
The calculation runs in three steps:
- Total reading time: quarantine duration in days × daily reading time in hours, converted to minutes.
- Total words read: total reading minutes × your reading speed in words per minute.
- Books needed: total words read ÷ average words per book, then increased by your safety buffer percentage and rounded up to a whole book, since you can't stock a fraction of one.
Reading-rate research places average adult silent reading speed for English text at roughly 200-300 words per minute (a widely cited meta-analysis puts the mean near 238 wpm), and typical adult novels run about 70,000-100,000 words. Both fields are adjustable so you can match your own pace and preferred book length.
Why the buffer matters
Reading pace is never perfectly steady — some days you'll read more than planned, and average book lengths vary from title to title. The safety buffer (default 20%) pads the base estimate so you're less likely to finish your stack early. A larger buffer favors having a book left over; a smaller buffer assumes a tighter, more predictable schedule.
Practical context
Use this as a planning estimate, not a guarantee — a gripping novel can be finished faster than your average pace suggests, and a dense one slower. Mixing book lengths, keeping an e-reader or library app as backup, and rounding up when in doubt are all reasonable ways to apply the result.