Zone Diet Calc Free - fast recipe calculator - gramsversion 1.0 this easy on-line free tool let you calculate your zone menus in minutes with a choice of 500 common food source. Instruction: 1.select the food 2.specify grams 3. optimize the weight to reach the protein/carbohydrates value nearest to 0,75. In the last four textboxes you can type the nutritional values in 100g of not listed food. Warning: nutrition is very important and you should be aware that food has great impact on your health. This calculator is merely a tool to ccalculate menu lists for the zone diet. The use of this tool is under your sole responsibility.