Calculators

Each calculator runs in your browser and shows the math and the sources it uses. Your own results will vary, so treat them as estimates.

• Book reading time calculator

  Work out how long a book will take to read from its page count, words per page and your reading speed, plus how many days at your daily reading time.

• Jet lag calculator

  Estimate how many days jet lag lasts from the time zones you cross and your direction of travel, using the CDC average adjustment rates.

• TSA PreCheck cost per trip calculator

  See what TSA PreCheck costs per trip through security over its five-year membership, by enrollment provider, trips per year and any card credit.