Fabric calcuator
 

This is a great one.
Saved me lots of time.

http://www.quiltersparadiseesc.com/Calculators.php

Interesting that they had a RK app on the page. I haven't tried the app yet on my tablet.

i saw that on 24Blocks today and bookmarked it

I've used that one for a couple years now...Love it.
Recently found
http://www.lilystreetquilts.com/lilystreet/calculators
and
http://mywebquilter.com/CalculateBacking.aspx

Interestingly enough, altho I typed in the same measurements for width, length, width of fabric, etc
Each one gave me different yardage calculations

Marietta,
I love your avatar! It made me laugh out loud. Been there done that for sure! I wish we lived closer together. I think we would be great friends! Have a good one!

Oh my gosh....thank you so very much for posting the link to the fabric calculator. I'd been racking my brain trying to figure out the backing for a quilt if I wanted to use 108" wide. Now I can stop beating my head against the wall. :D

I use this calculator all the time to figure backing, binding, etc.