How Much Fat Do I Need Per Day?
There is no single correct fat grams-per-day number for everyone. Needs change with total calories, age, health conditions, and how you eat. This dietary fat calculator does not pick a target for you. It converts the calorie share you enter into grams so you can see what a chosen percentage looks like on a plate.
Many general nutrition references describe fat as roughly 20–35% of daily calories for adults. That is a broad range, not a personal prescription. If you already have a calorie target, start from the calorie calculator or TDEE calculator, then split macros here, with daily carb intake and protein intake.
Daily Fat Intake Calculator
Pedzah calculates fat grams as:
fat grams = daily kcal × (fat % / 100) / 9
The result is rounded to a whole number of grams. Example: 2,000 kcal with 30% of calories from fat → 67 g fat per day. Calories from fat shown in the result card are kcal × fat % / 100 (not a second formula).
Fat Intake by Calories
Fat is energy-dense: 1 gram of fat provides 9 kilocalories, compared with 4 kcal per gram for carbohydrate and protein. At a fixed percentage, a higher calorie budget yields more fat grams; a lower budget yields fewer. Changing the percentage at the same calorie level changes grams in proportion.
Dietary Fat Explained
Dietary fat is the fat in food. This tool estimates total fat grams from calories — it does not separate saturated, unsaturated, or trans fat, and it does not score diet quality. “Calories from fat” is simply the portion of your calorie total assigned to fat at the percentage you entered. Fat is one part of a mixed diet, alongside carbohydrate and protein; for a three-way split see the macro calculator.
Informational only — not medical advice. Results are estimates. Consult a qualified clinician for health decisions.