Sarah, another thought--you could weigh your clothes, a bowl of dry cereal, and water to account for the milk on your cereal--and deduct that from this morning's scale number.
Age 67, 5 feet tall
Highest weight ever in the fall of 2010 246 lbs.
FitDay starting weight 1/17/2011 240 lbs.
Weight 12/18/2013 on my doctor's scale 231 lbs.
Weight 1/2/2014 on my new home scale 229.4
Weight 3/9/2014 225