For all of us who have a hard time keeping ounces, cups, tablespoons and milliliters straight, especially when we're halving or tripling a recipe on the fly, here are a couple of simple visual tools for quick reference. And if these don't do the trick, do remember Google Calculator.
This sturdy, laminated Conversion Confusion chart from Green Chair Press is $6 and it is offered as either a magnet or a bookmark - whichever you prefer. It has both wet and dry conversions at a glance.
Fantes, the incredibly well-stocked online kitchen store, also has magnets like this one, a listing of 
Since food blogging seems to be such an international affair, I've tried to find an imperial/metric converter to post on my blog, but to no avail. Anyone else know of one? In the meantime, I may just create some charts such as the ones you've highlighted here.
Terry, check out Chocolate and Zucchini's conversion charts - she has some helpful stuff there too.
http://chocolateandzucchini.com/archives/2006/09/conversions_equivalents.php
Type 6 QUARTS IN TABLESPOONS, or whatever, as a Google search and there's your conversion:
6 US quarts = 384 US tablespoons
Works for pretty much all units of measurement. Like magic.
I usually use this website.
http://www.onlineconversion.com/
I, um, refer to this dish towel often: http://tinyurl.com/38pdz5
Just wondering. If on your chart 1/3 cup = 5 Tbsp.
Then why does 2/3 cup = 11 Tbsp. Something seems incorrect with this math.
JoAnn: You're right, my math is wrong. Sometimes rounding isn't a good idea. But since I make these magnets to order, it's an easy problem to fix. Take a look again -- 1/3cup = 5-1/3 Tbsp and 2/3cup = 10-2/3 Tbsp.