Want to laugh and cry at the same time? This nifty new internet calculator can show you EXACTLY how much sleep you've lost because of your kids. Nothing like knowing you're missing six months of shut eye, right?

Check out the Lost Sleep Calculator for Parents. If you enter your child's age, you'll get an precise amount of sleep missed--and I do mean PRECISE. Down to the HOUR precise.

My daughter is about to be five, and that means I've missed (and brace yourself) 3,330 hours of sleep. That's 139 days or FIVE WHOLE MONTHS.

You can even add up the total for multiple kids--which, if you have more than one, Godspeed. Check it out--and if you need me, I'll be over here trying to squeeze in a power nap.