Estimate daily fat and saturated fat allowances for weight maintenance, loss and gain goals.
Adjusts calorie targets for different weight change rates. 1 lb of body fat ≈ 3,500 kcal; 1 kg ≈ 7,700 kcal.
| Goal | Daily Calorie Allowance | Daily Fat Allowance (20-35%)* | Saturated Fat Allowance (10%)* | Saturated Fat Allowance to Help Reduce Heart Disease (7%)* |
|---|
* Note that the percentages provided reflect percentages of total daily caloric intake
The Dietary Guidelines for Americans recommend limiting saturated fat to less than 10% of daily calories. For heart disease risk reduction, the AHA recommends further reducing saturated fat to 5-6% of total calories, replacing it with monounsaturated and polyunsaturated fats.
Dietary fats are one of the three primary macronutrients, along with carbohydrates and proteins. Fats are the most energy-dense macronutrient, providing 9 kilocalories per gram — more than double the energy density of carbs and protein (4 kcal/g each). Fats are essential for hormone production, nutrient absorption, brain function, cell membrane structure, insulation and long-term energy storage.
Considered heart-healthy. Found in olive oil, avocados, nuts and seeds. Helps lower LDL (bad) cholesterol and raise HDL (good) cholesterol.
Includes Omega-3 and Omega-6 essential fatty acids. Found in fatty fish, walnuts, flaxseeds and vegetable oils. Supports brain and heart health.
Found in red meat, full-fat dairy, butter and coconut oil. Raises LDL cholesterol. Should be limited to less than 10% of total calories.
Artificially produced through hydrogenation. Found in processed foods, fried foods and baked goods. Raises LDL and lowers HDL. Should be avoided entirely.
| Goal | Daily Calorie Delta | Considerations |
|---|---|---|
| Weight Maintenance | ± 0 kcal | Matches estimated total daily energy expenditure |
| Lose 1 lb / 0.5 kg per week | −500 / −550 kcal | Moderate deficit; generally safe and sustainable |
| Lose 2 lb / 1 kg per week | −1000 / −1100 kcal | Aggressive deficit; may cause muscle loss if protein is insufficient |
| Gain 1 lb / 0.5 kg per week | +500 / +550 kcal | Moderate surplus; supports lean muscle gain with training |
| Gain 2 lb / 1 kg per week | +1000 / +1100 kcal | Aggressive surplus; higher likelihood of fat gain |
The 10% saturated fat limit comes from the Dietary Guidelines for Americans and WHO. The 7% column reflects the more restrictive American Heart Association recommendation for people with or at risk of cardiovascular disease. Replacing saturated fat with polyunsaturated fat has been shown to reduce LDL cholesterol and coronary heart disease risk.
| Fat Type | Primary Food Sources |
|---|---|
| Monounsaturated | Olive oil, canola oil, avocados, almonds, cashews, peanuts, sesame seeds |
| Polyunsaturated (Omega-6) | Sunflower oil, safflower oil, corn oil, soybean oil, walnuts |
| Polyunsaturated (Omega-3) | Salmon, mackerel, sardines, chia seeds, flaxseeds, walnuts, hemp seeds |
| Saturated | Butter, cheese, whole milk, red meat, coconut oil, palm oil, cream |
| Trans Fat | Partially hydrogenated oils, fried foods, commercial baked goods, margarine, processed snacks |
All values provided by this calculator are estimates based on standard population equations and guidelines. Individual calorie and fat needs can vary significantly based on genetics, body composition, metabolism, hormone levels, medications and specific health conditions.
Aggressive weight loss rates (2 lb/week or more) may not be appropriate for all individuals, especially those with lower body weight or pre-existing health conditions. This calculator is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider or registered dietitian before making significant dietary changes.
1. Institute of Medicine. "Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids." 2005.
2. World Health Organization. "Diet, nutrition and the prevention of chronic diseases." 2003.
3. American Heart Association. "Dietary recommendations for healthy adults."
4. Dietary Guidelines for Americans 2020-2025. U.S. Department of Agriculture and HHS.
5. Mifflin MD, St Jeor ST, et al. "A new predictive equation for resting energy expenditure in healthy individuals." American Journal of Clinical Nutrition 1990.