What is normal percent of calories from carbs?

There is no "ideal" that will suit everyone. Unlike protein and fats, carbohydrates are not essential for health or to sustain life. You would die without proteins and fats but that does not apply to carbohydrates.

However, for an average person (who does not need to lose weight, is not carbohydrate sensitive, is not insulin resistant, and does not have difficulty losing weight), the diet can provide a large proportion of energy from this nutrient. If you exercise frequently, your carbohydrate intake can be higher. A diet with a low carbohydrate intake can make exercise feel tough, especially if the exercise is anerobic. If exercise becomes tough the result can be a decreased desire to repeat any workout again, reduced workouts equals reduced fitness results!

Your diet can provide a carbohydrate intake of up to 60% of total daily energy (unless you need to lose weight, or if you are carbohydrate sensitive, or if you are insulin resistant, or if you have difficulty losing weight). A large percentage should come from natural sources such as vegetables, with some fruit and grains. Approximately 300 grams per day for an average person (who does not need to lose weight, etc) is high and should be adjusted according to needs and individual health status.

If you need to lose weight, or if you are carbohydrate sensitive, or if you are insulin resistant (syndrome X), or if you have difficulty losing weight, your carbohydrate intake needs to be reduced and controlled. For more information, about how many carbohydrates per day for weight loss, see the page link, further down this page, listed under Related Questions.