Fat Intake Calculator
Calculate recommended total and saturated fat intake for your calorie target.
About Fat Intake Calculator
Dietary fat is essential for fat-soluble vitamins (A, D, E, K), hormone production and cell membrane integrity. The AMDR for fat is 20–35% of total calories for adults. The type of fat matters: replacing saturated fat with unsaturated fat (especially polyunsaturated) is associated with reduced LDL cholesterol and cardiovascular risk. Trans fats should be avoided — most countries have banned or limited them in food manufacturing.
Formula
Fat grams from calorie percentage
Fat (g) = (Total calories × Fat percentage) ÷ 9 kcal/g
- F
- Fat in grams
- E
- Total daily calorie target
- p
- Fat fraction (e.g. 0.30 for 30%)
Worked example
With the default values below, Fat Intake Calculator returns Recommended Total Fat of 61. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Daily Calorie Targetaccepts 500–10,000 kcal
- 2,000 kcal
- Health Goalone of Balanced (20–35% AMDR), Low fat (20–25%), Moderate fat (30–35%), High fat / Low carb (40–50%)
- Balanced (20–35% AMDR)
Results
- Recommended Total Fat
- 61 g/day
- Minimum Fat
- 44 g/day
- Maximum Fat
- 78 g/day
- Saturated Fat Limit (WHO)WHO recommendation: <10% of total calories.
- 22 g/day
- Saturated Fat Target (AHA)AHA recommendation for cardiovascular health: ≤5–6% of calories.
- 12 g/day
- Unsaturated Fat (remainder)Prioritise monounsaturated and polyunsaturated sources.
- 49 g/day
Step by step
- 1Total fat range= 44–78 g/day
- 2Recommended total fat (midpoint)= 61 g/day
- 3Saturated fat ceiling (WHO <10%)= 22 g/day
- 4Saturated fat target (AHA ≤5.5%)= 12 g/day
Assumptions and limits
- The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to whole numbers, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
- Fat recommendations are estimates based on population guidelines from the WHO, IOM and AHA. Individual needs vary with metabolic health and cardiovascular risk factors. This is not medical advice — consult a registered dietitian or cardiologist for personalised guidance.
- This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Fat recommendations are estimates based on population guidelines from the WHO, IOM and AHA. Individual needs vary with metabolic health and cardiovascular risk factors. This is not medical advice — consult a registered dietitian or cardiologist for personalised guidance.
Frequently Asked Questions
Is fat bad for you?
Fat is essential — reducing it below 20% of calories impairs fat-soluble vitamin absorption and hormone production. The concern is specifically with saturated and trans fats in excess. Replacing saturated fat with unsaturated fat (olive oil, nuts, avocado, oily fish) is associated with better cardiovascular outcomes.
How much saturated fat is safe?
WHO recommends saturated fat below 10% of total calories; the AHA recommends 5–6% for people with heart disease risk. At 2,000 kcal/day, that's 13–22 g of saturated fat. A small portion of cheese or a couple of rashers of bacon can easily reach that ceiling.
Should I follow a low-fat or high-fat diet?
Both low-fat and high-fat (including ketogenic) diets can support weight loss when calories are controlled. The best approach is one you can adhere to long-term. Mediterranean-style moderate-fat diets have the most long-term evidence for cardiovascular health.