I'm looking for a site with the height/weight AND age chart for adults.

You may want to try www.webmd.com
I find this site quite useful.

For adults, we use:

(Weight in kgs)/(Height in metres squared)

If this result is between 20 and 25 you are ok,
If less than 20 you are underweight, if over 25 you are overweight.

For people working in ft/lbs you can convert by:

Weight in kgs = Weight in lbs / 2.205
Height in metres = Height in inches * 0.0254

Here's a site with several ways to calculate your proper weight, taking into account your age. halls.md - body mass index
Be sure to scroll down the page and try the Ideal Weight Calculator, too!

That site also offers a few other health calculators.