Ballpark — March 17, 2026
Answers to that day's 5 daily estimation questions.
Frets on a typical guitar (common)
~22 frets
Some models have 21 or 24, but 22 is common.
About how fast does a typical raindrop fall at terminal velocity?
~20 mph
Raindrops don’t fall as fast as you’d think—often around 15–25 mph.
About how many millimeters do fingernails grow in a month?
~3 mm/month
Fingernails typically grow a few millimeters per month.
About how much does a typical paperback book weigh?
~300 g
A paperback often weighs a few hundred grams.
About how many sheets (squares) are in a typical roll of toilet paper?
~250 sheets
A standard roll is often a couple hundred sheets.