Calculate your recommended daily fat intake — total fat, saturated fat, and healthy unsaturated fats — based on total calorie needs and NHMRC guidelines.
Dietary fat should make up about 20–35% of your daily calories. Since fat provides 9 calories per gram, someone eating 2,000 calories needs roughly 44–78 grams of fat per day. Most of it should come from healthy unsaturated fats like olive oil, nuts, seeds and fish, while saturated fat is best kept under about 10% of calories.
| Fat type | Grams/day | Guideline |
|---|
Your fat target comes from your daily calories. Choose what percentage of calories should come from fat, then convert to grams — fat has 9 calories per gram.
Total fat stays within a similar range for most goals; what changes most is the type and the balance with other macros.
| Goal / Group | Fat (% of calories) | For 2,000 cal |
|---|---|---|
| General health | 20–35% | 44–78 g |
| Weight loss | 20–30% | 44–67 g |
| Muscle gain | 20–30% | 44–67 g |
| Low-fat diet | 15–20% | 33–44 g |
| Ketogenic diet | 60–75% | 133–167 g |
The type of fat matters more than the total. Unsaturated fats support heart and brain health; trans fats should be avoided.
| Fat Type | Effect | Food Sources |
|---|---|---|
| Monounsaturated | Heart-healthy | Olive oil, avocado, nuts |
| Polyunsaturated (omega-3/6) | Essential; anti-inflammatory (omega-3) | Fish, walnuts, flaxseed, seeds |
| Saturated | Limit to under 10% of calories | Fatty meat, butter, full-fat dairy |
| Trans fat | Avoid — raises heart risk | Some fried & processed foods |
Both are found in food, but they affect health differently. Replacing some saturated fat with unsaturated fat is linked to better heart health in dietary guidelines.
| Feature | Saturated Fat | Unsaturated Fat |
|---|---|---|
| State at room temp | Usually solid | Usually liquid |
| Main sources | Butter, fatty meat, coconut oil | Olive oil, fish, nuts, seeds |
| Guideline advice | Keep under ~10% of calories | Make up most of your fat intake |
| Heart health | Excess may raise LDL cholesterol | Supports healthy cholesterol |
The NHMRC recommends fats comprise 20–35% of total energy (AMDRs). The Australian Dietary Guidelines recommend replacing saturated fats with unsaturated fats.
Saturated fat: Limit to <10% of energy (meat, dairy, coconut oil).
Monounsaturated: Heart-healthy (olive oil, avocado, nuts).
Polyunsaturated (omega-3/6): Essential (oily fish, flaxseed, walnuts).
Trans fat: Minimise (processed foods, some margarines).
Fat is an essential macronutrient — not a dietary enemy. It serves critical functions: absorbing fat-soluble vitamins (A, D, E, K), supporting hormone production (including testosterone and oestrogen), maintaining cell membrane integrity, and providing the most energy-dense fuel source at 9 calories per gram. Going too low in fat (under 15-20% of calories) impairs these functions.
| Fat Type | Food Sources | Effect on Health | NHMRC Guidance |
|---|---|---|---|
| Monounsaturated (MUFA) | Olive oil, avocado, almonds | Reduces LDL, supports HDL | Include liberally |
| Polyunsaturated (PUFA) | Fatty fish, walnuts, flaxseed | Omega-3 reduces inflammation, CVD risk | Include regularly |
| Saturated fat | Red meat, butter, coconut oil, dairy | Raises LDL cholesterol in excess | Under 10% of calories |
| Trans fat (artificial) | Partially hydrogenated oils, some fried foods | Raises LDL, lowers HDL — harmful | Minimise/avoid |
| Goal / Calories | Fat at 25% | Fat at 30% | Fat at 35% |
|---|---|---|---|
| 1,600 cal/day | 44g | 53g | 62g |
| 2,000 cal/day | 56g | 67g | 78g |
| 2,500 cal/day | 69g | 83g | 97g |
How much fat should I eat per day?
NHMRC recommends 20-35% of total calories from fat for Australian adults. On 2,000 calories/day: 44-78g of fat. The minimum for hormonal health and fat-soluble vitamin absorption is approximately 0.5g per kg of bodyweight. Quality matters as much as quantity — prioritise unsaturated fats from olive oil, avocados, nuts, and oily fish.
Is fat bad for weight loss?
No. Fat itself does not cause fat gain — excess total calories do. Low-fat diets and low-carb diets produce similar weight loss outcomes when total calories are matched. Dietary fat is more energy-dense (9 cal/g vs 4 cal/g for protein or carbs), so portion awareness matters, but fat does not need to be minimised for weight loss.
What is the difference between saturated and unsaturated fat?
Unsaturated fats (mono and polyunsaturated) are generally health-protective — they lower LDL cholesterol and support cardiovascular health. Found in olive oil, avocados, nuts, and oily fish. Saturated fats (found in red meat, butter, and coconut oil) raise LDL when consumed in excess. Trans fats (artificial hydrogenation) are the most harmful and should be avoided.
How much fat should I eat per day?
Most guidelines suggest fat makes up 20–35% of your daily calories. At 2,000 calories, that is about 44–78 grams. Enter your calories and goal in the calculator above for a personalised gram target. Aim to get most of it from unsaturated sources.
How many grams of fat per day for weight loss?
For weight loss, fat around 20–30% of a reduced calorie intake works well. For example, at 1,600 calories, 25% from fat is 1,600 × 0.25 ÷ 9 ≈ 44 grams. Keeping some healthy fat supports hormones and fullness; total calories still drive the weight loss.
What are healthy fats?
Healthy fats are mainly unsaturated fats — monounsaturated and polyunsaturated. Good sources include olive oil, avocado, nuts, seeds and oily fish. These support heart and brain health and help your body absorb fat-soluble vitamins. They should make up the majority of your fat intake.
How much saturated fat is too much?
Health guidelines recommend keeping saturated fat under about 10% of your daily calories — roughly 22 grams on a 2,000-calorie diet. Replacing some saturated fat with unsaturated fat is linked to better heart health. Trans fats should be avoided as much as possible.
Does eating fat make you fat?
No. Eating fat does not automatically cause weight gain — an excess of total calories does. Fat is calorie-dense at 9 calories per gram, so portions matter, but healthy fats are an important part of a balanced diet and can support fullness and weight control.
What is the difference between omega-3 and omega-6?
Both are essential polyunsaturated fats. Omega-3s (from oily fish, flaxseed, walnuts) are anti-inflammatory and support heart and brain health. Omega-6s (from many vegetable oils) are also needed but are plentiful in modern diets. Most people benefit from eating more omega-3 rich foods.
Do I need fat if I want to lose weight?
Yes. Even during weight loss, some dietary fat is essential for hormone production, brain function and vitamin absorption. Very low-fat diets can be hard to sustain and may affect hormones. Focus on healthy fats in appropriate portions rather than cutting fat out entirely.