Fat Intake Calculator

Reviewed by the CalculatorHub team, edited by James Graham. Method from USDA DRI Calculator. Last verified 2026-06-23.

The Fat Intake Calculator computes fat intake from the relation fat grams = (total calories x fat percent / 100) / 9 kcal per gram. It takes 2 inputs (total daily calories in kcal, fat share of calories in percent) and returns the fat intake. Because this is a pure mathematical or physical formula rather than a jurisdiction-specific rule, the result never changes over time: the same inputs always produce the same answer, so you can rely on it whether you are checking homework, sizing a design, or sanity-checking another tool. Enter your values in the fields below and the result updates instantly; you can also share a permalink that pre-fills the exact calculation, which is useful for teaching, reports, or collaboration. For example, with total daily calories = 2000 kcal, fat share of calories = 30 percent, the fat intake works out to 66.666667, and the worked example further down the page shows every step so you can follow the arithmetic and reproduce it by hand. The method is the standard form documented by USDA DRI Calculator, and the figure above each result carries the date it was last verified. This tool is general information and is not a substitute for professional engineering, medical, financial, or scientific advice; always check critical results against the primary source and your own judgement.