There are a number of different types of nutrition calculators available online, as of 2015, including recipe nutrition calculators, daily calorie needs calculators, BMI Index calculators and dietary reference intake calculators.
Recipe nutrition calculators allow users to input each ingredient from a chosen recipe, as well as the serving size, to discover the amount of calories, carbs, fat, protein, sodium and sugar wn the recipe. As of 2015, users can use a free recipe nutrition calculator on MyFitnessPal.com.
Daily calorie needs calculators estimate the number of calories that a user burns during daily activities and exercise. A user must include his age, sex, weight, height and lifestyle in addition to how many minutes per day he exercises. The calculator crunches these numbers to come up with the user's BMI and how many calories he should consume each day based on his results. As of 2015, users can access a free daily calorie needs calculator on NutritionData.com.
BMI index calculators determine the user's level of body mass, or body fat, based on his height and weight. They can help users determine whether they are at risk for weight-related health problems. In healthy adults, a normal BMI ranges between 18.5 and 24.9. Users can access the free BMI index calculator found on CCHRCHealth.org.
Dietary reference intake calculators determine the daily nutrient recommendations and are useful for planning diets and ensuring health needs are met. The calculator requires the user to input his sex, age, height, weight and activity levels. It calculates the ideal diet plan based on macronutrients, vitamins and minerals. A free DRI calculator is available at the U.S. Department of Agriculture's National Agricultural Library.