The site first looked at the median household income across 98 major cities and calculated the average hourly rate in each (based on a 40-hour work week). Next, it looked at median home prices in each city in order to calculate the typical monthly mortgage payment, assuming a 30-year loan.
Using those two numbers, Howmuch.net figured out how long you'd have to work in each city to make that mortgage payment each month.
The site mapped its results. "The red bars represent places where you have to work the most hours to keep the roof over your head," Howmuch.net reports. "In cities like Los Angeles, Miami, and San Francisco, you put in more than 100 hours to make enough money just to pay for housing. That's longer than two-and-a-half weeks, meaning well over 50 percent of your take-home pay."
In Toledo, Ohio, and Memphis, Tenn., by contrast, you could pay your mortgage pretty quickly with only 17 or 18 hours of work.
Click on the map to enlarge.