New & Really Liking MFP Also, A Question...

Hi! After counting my food intake and exercise the hard way, I cam across this site and am very happy. This makes things so much simpler. I work from home, I live in a city that practically swims n butter and those two things combined with a stressful year have led me to one heck of a muffin top that is not going anywhere just by wishful thinking. So, here I am. Now, for my question (if it belongs in another forum please, kindly let me know), don't own a scale and I really don't want to track my weight based on a number to me that does not properly reflect muscle tone. I track my measurements instead as a way to gauge my progress. Is there any way to calculate what my weight may be just by tallying my waist, hip, thigh totals?
Thanks in advance for the help.