Hello and thank you for your question!
If you are referring to how to find the total carbohydrates and the saturated fat in food and beverages, you can find that information in the nutrition facts on packaged products. Here are a few tips on how to read the nutrition facts label. There is also an Interactive Nutrition Label Guide available as well if you are looking for more information!
If you are referring to the daily recommended range for total carbohydrates and saturated fat, the general recommendation is to limit added sugars (not total carbohydrates) to less than 10% per day and limit saturated fats to less than 10% per day.1 The Dietary Guidelines for Americans encourage limiting these nutrients (as well as sodium or salt) to support an overall healthy eating pattern. The guidelines are not meant to be rigid rules but rather an adaptable framework in which you can enjoy foods that meet your personal, cultural and traditional preferences and fit within your budget.
Hope this helps and is the assistance you are looking for!
U.S. Department of Health and Human Services and U.S. Department of Agriculture. 2015 – 2020 Dietary Guidelines for Americans. 8th Edition. December 2015. Available at https://health.gov/dietaryguidelines/2015/guidelines/.