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Fat Intake Calculator
Daily fat in grams, split into saturated and unsaturated.
Every level, in grams
| Share of calories | Total fat | Calories from fat |
|---|
How fast common foods use the allowance
| Food | Serving | Fat | Saturated |
|---|---|---|---|
| Olive oil | 1 tbsp | 14 g | 2.0 g |
| Butter | 1 tbsp | 12 g | 7.2 g |
| Almonds | 30 g | 15 g | 1.1 g |
| Avocado | Half | 15 g | 2.1 g |
| Cheddar cheese | 30 g | 9 g | 6.0 g |
| Salmon fillet | 100 g | 13 g | 3.1 g |
Daily fat target
—
Limits and floors
Saturated fat cap (10%)—
Heart-health cap (6%)—
Minimum fat (20%)—
Healthy range (20–35%)—
Per meal
Across 3 meals—
Calories from fat—
—
Where your chosen share sits against guidance
Guidance generally puts fat at 20 to 35 percent of daily calories, caps saturated fat at about 10 percent, and heart-health advice at 6 percent. Below roughly 15 to 20 percent of calories, absorption of the fat-soluble vitamins and hormone production can suffer. Not medical advice.
Quick Tool Overview
The Fat Intake Calculator turns a calorie target into daily fat grams, along with the saturated fat ceiling that guidance sets and a minimum you should not drop below. Fat carries nine calories per gram, so small changes move the total faster than with the other macros.
- What it does
- Calculates daily fat grams and the saturated fat limit
- You give it
- A calorie target or your details, and a fat percentage
- You get back
- Total fat, saturated cap and an essential fat floor
- Best for
- Heart-health targets, keto planning and macro balancing
About the Fat Intake Calculator
Work out how many grams of fat to eat each day for your calorie target, along with the saturated fat ceiling that goes with it and the minimum you should not drop below. Fat carries nine calories per gram, so small changes move the total quickly.
Dietary fat does more than supply energy. It carries the fat-soluble vitamins A, D, E and K, supplies the essential fatty acids the body cannot make, and underpins hormone production, which is why very low fat diets tend to cause problems that very low carbohydrate diets do not. The calculator therefore protects a floor of roughly 20 percent of calories before it reports a range, and separates the saturated portion, which is the part guidance actually caps.
Key features of the Fat Intake Calculator
Saturated fat capped separately
Guidance limits saturated fat to about 10 percent of calories, and heart-health advice to 6 percent — both are shown in grams.
A protected minimum
A floor near 20 percent of calories is enforced, because very low fat intakes impair vitamin absorption and hormone production.
The full range
From the 20 percent floor up to ketogenic shares, so you can see what each choice costs the other macros.
Food reference
Cooking oils, butter and nuts are listed with their fat per serving, since they use the allowance faster than people expect.
Instant recalculation
Change any input and every figure updates as you type.
How to use the Fat Intake Calculator
-
1
Enter calories or your details
Give a calorie target directly, or have maintenance estimated from age, sex, height, weight and activity.
-
2
Choose a fat percentage
Anywhere from a 20 percent floor up to a high-fat or ketogenic share of calories.
-
3
Read the grams
Total fat per day, the saturated fat limit, and a minimum you should stay above.
-
4
Compare to your intake
Check the food reference to see how quickly cooking oils and spreads use the allowance.
Frequently asked questions
Guidance generally puts fat at 20 to 35 percent of daily calories, which is roughly 44 to 78 grams on a 2,000 calorie diet. Ketogenic diets deliberately run far higher.
Most guidelines cap saturated fat at about 10 percent of calories, and heart-health advice often at 6 percent. On 2,000 calories that is roughly 22 and 13 grams respectively.
Below about 15 to 20 percent of calories, absorption of fat-soluble vitamins and hormone production can suffer. Very low fat diets exist clinically but are not a sensible default.
Not by itself. Fat is calorie-dense, so it is easy to overeat, but weight gain still follows total energy intake rather than any one macronutrient.
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