Calculate daily fat intake and macro grams from your calorie target and preferred fat ratio.
This tool provides estimates for informational purposes only. It is not a substitute for medical, nutrition, or fitness advice. Individual results vary based on your health status, training background, body composition, and personal circumstances. Always consult a qualified healthcare or fitness professional before making important decisions based on the output.
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Fat is an essential macronutrient: it supplies energy, carries the fat-soluble vitamins A, D, E and K, and provides the building blocks for hormones. Standard guidance places fat at 20–35% of daily calories. Because fat is the most energy-dense macronutrient at 9 calories per gram, the calculator divides your target fat calories by 9 to give a figure in grams.
Going much below 20% of calories can impair vitamin absorption and hormone production, while very high intakes can crowd out other nutrients if total calories are not managed. Most people do best keeping fat within the recommended band and focusing on quality.
Favour unsaturated fats — found in olive oil, avocado, nuts, seeds and oily fish like salmon. These support heart health and provide omega-3 fatty acids that the body cannot make on its own. They should make up the bulk of your fat intake.
Keep saturated fat — from fatty meat, butter, cheese and many baked goods — to under about 10% of total calories, as high intakes can raise LDL cholesterol. Avoid industrial trans fats (often listed as "partially hydrogenated oils") entirely, since they raise bad cholesterol and lower the good kind. Reading labels and cooking with liquid oils rather than solid fats are simple ways to shift the balance toward healthier sources.
Dietary fat usually makes up 20-35% of daily calories. At 9 calories per gram, someone eating 2,000 calories would aim for about 44-78 g of fat per day.
It estimates your daily calories, applies your chosen fat percentage, then divides by 9 calories per gram (fat is the most energy-dense macronutrient) to give grams per day.
Favour unsaturated fats from olive oil, nuts, seeds, avocado and oily fish. Limit saturated fat to under about 10% of calories and avoid industrial trans fats entirely.
Both can work for weight management — total calories matter most. Very low fat intake can impair vitamin absorption and hormone production, so most people do best keeping fat at 20% of calories or above.