# Fat Intake Calculator

> Turn your daily calories into grams of total fat (20–35% AMDR, WHO 30% limit), saturated fat under 10% and trans fat under 1% of energy.

Category: Health & fitness · Applies to: Worldwide · Last updated: 2026-10-29
Interactive calculator: https://calculators.geekmidst.com/calculators/fat-intake-calculator

Fat guidelines are set as a share of daily energy. This converts those shares into grams, using 9 kcal per gram of fat.

Also called: Daily fat calculator.

## Inputs
- Daily calories (unit kcal; default 2000)

## Results
- Total fat (20–35% of energy)
- Lower end (20%)
- Upper end (35%)
- WHO upper limit (30%)
- Saturated fat, at most (10%)
- Trans fat, at most (1%)

## Formula

```
Fat (g) = Calories × share ÷ 9;  total fat 20–35% (AMDR), ≤ 30% (WHO);  saturated ≤ 10%;  trans ≤ 1%
```

Where:
- Calories: daily energy intake in kcal
- share: the guideline percentage as a fraction
- 9: kcal per gram of fat

## Worked example
1. 20% of 2,000 = 400 kcal ÷ 9 = 44 g; 35% = 700 kcal ÷ 9 = 78 g.
2. WHO 30%: 600 ÷ 9 = 67 g.
3. Saturated fat 10%: 200 ÷ 9 = 22 g; trans fat 1%: 20 ÷ 9 = 2.2 g.

**Result:** On 2,000 kcal a day, total fat of about 44–78 g fits the AMDR, with no more than 22 g of saturated fat.

## What the result means

The type of fat matters more than the total: guidelines favour replacing saturated and trans fats with unsaturated fats from foods such as fish, nuts, seeds and vegetable oils.

## Assumptions and limits
- Guidelines are for healthy adults: the AMDR of 20–35% (US/Canada Dietary Reference Intakes) and the WHO 2023 guideline on fats.
- Fat provides 9 kcal per gram.
- Children, pregnancy and medical diets (for example for pancreatitis or high triglycerides) have different targets.
- Food labels round fat content, so tracked totals are approximate.

## Questions

### Why do the AMDR and WHO figures differ?

The AMDR range (20–35%) is the band associated with adequate nutrition and lower chronic-disease risk in US/Canada reviews; WHO advises adults keep total fat at 30% or less. Both set saturated fat near 10% or below.

### Is low-fat always better?

Not necessarily. Below about 20% of energy it becomes harder to get essential fatty acids and fat-soluble vitamins, and low-fat foods are often higher in refined carbohydrate.

## Sources
- [WHO (2023): WHO updates guidelines on fats and carbohydrates](https://www.who.int/news/item//17-07-2023-who-updates-guidelines-on-fats-and-carbohydrates)
- [Ernährungs Umschau: Dietary Reference Intakes report on total fat (AMDR)](https://ernaehrungs-umschau.de/print-artikel/08-04-2003-dietary-reference-intakes-dri-report-6-part-2-total-fat-fatty-acids-and-cholesterol)

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_This is a general screening estimate for adults, not medical advice or a diagnosis. Talk to a qualified health professional about your health._

Source: GM¹X CalcVerse — https://calculators.geekmidst.com/calculators/fat-intake-calculator