If your carbs are more than 30% of all calories, the calculator now recommends that you eat 30% of calories as protein and computes the fat calories and grams so that
Fat Percent = 100 - (Carb percentage + 30%)
This works a lot better for people of all different sizes than the previous version.
You'll find it here: http://www.phlaunt.com/lowcarb/DietMakeupCalc.php
Thanks for your very helpful feedback.
And yes, I know I need to find an URL for the low carb site, but the ones I want are all taken.