To determine how many calories are in biscuits made from scratch, add up the amount of calories in the biscuit ingredients, then divide this figure by the number of biscuits that the recipe produces. Weight measurements are often more accurate than volume measurements in determining the caloric content of a food. Use a kitchen scale to ensure your figures are as accurate as possible.
The exact calorie count of homemade biscuits depends on the ingredients used. SeriousEats.com's recipe for quick and easy drop biscuits calls for 4 ounces unsalted butter, 1 1/2 cups all-purpose flour, 2 teaspoons baking powder, 1 teaspoon kosher salt and 3/4 cup whole milk. Most brands of store-bought flour, butter and milk have applicable nutritional information printed on the box or carton. Calculate calories based on the per-serving amounts listed on the packaging.
It is also possible to use an online calculator to estimate the caloric content of the biscuits. Enter the foods and their amounts into a calculator such as the one on CalorieKing.com. One stick of unsalted butter contains 809 calories. One and a half cups of flour contains 683 calories. Three quarters of a cup of whole milk contains 110 calories.
Baking powder and salt contain negligible amounts of calories. Add the applicable calorie amounts together, then divide by the number of biscuits that the recipe yields. This recipe yields 20 small 80-calorie biscuits, or eight large 200-calorie biscuits.