I didn't have a scale because I am living away from home temporarily and didn't want an extra when I get back. I had been using one at the gym I go to.

I'm in the military, and they weigh us in at least twice a year. Needless to say, their scales are (usually) calibrated and more accurate than home scales. Last time I had to get weighed I was shocked to find that the scale at the gym was weighing me 9 pounds lighter than the doc's scale. That is not a minor difference, especially considering what happens to you if you go over the military weight limit...

Bought a scale that day, and set it a few pounds high. Yikes.