I was planning to do something that took about 45 seconds and I wanted to know how long it would take if I did it 15 times. In the past, I’ve also wanted to calculate other things that were time-related and found that a regular calculator wasn’t all that useful. So, I’ve created a time calculator that you can use to add and subtract two durations of time, or multiply and divide a duration of time by some factor.

Now you can calculate how much time you spend waiting at red lights. At 10 minutes a day, assuming you work 5 days a week, that’s 50 minutes a week. I’m guessing people take vacation and have sick days, so say they work 45 weeks a year, that is 37 hours and 30 minutes a year.

Nifty.