# Fat Intake Calculator

> Estimate daily fat grams from total energy needs, show a 20–35% reference interval, and calculate a less-than-10% saturated-fat comparison.

Page: https://askcalculators.com/calculator/fat-intake-calculator/
Definition: https://askcalculators.com/calculator/fat-intake-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/fat-intake-calculator/schema.json
Version: 2.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/calculator/fat-intake-calculator/?unitSystem=metric&sex=male&age=30&formula=mifflin&weightKg=70&heightCm=175&activity=moderate&fatPercent=30

## Inputs
- unitSystem: Units; type=select; required; default=metric; values=metric|imperial
- sex: Sex used by equation; type=select; required; default=male; values=male|female
- age: Age; type=number; required; default=30; min=18; max=100
- formula: BMR equation; type=select; required; default=mifflin; values=mifflin|harris|katch
- bodyFatPercent: Body fat; type=percent; required; default=20; min=1; max=79; showWhen=formula:katch
- weightKg: Weight; type=number; required; default=70; min=1; max=500; showWhen=unitSystem:metric
- heightCm: Height; type=number; required; default=175; min=50; max=300; showWhen=unitSystem:metric
- weightLb: Weight; type=number; required; default=154; min=2; max=1100; showWhen=unitSystem:imperial
- feet: Height feet; type=number; required; default=5; min=1; max=9; showWhen=unitSystem:imperial
- inches: Height inches; type=number; required; default=9; min=0; max=11.9; showWhen=unitSystem:imperial
- activity: Activity level; type=select; required; default=moderate; values=sedentary|light|moderate|active|veryActive|extraActive
- fatPercent: Target fat share; type=percent; required; default=30; min=5; max=60

## Outputs
- targetFat: Target total fat; format=number; primary
- referenceRange: 20–35% reference range; format=text
- saturatedLimit: Less-than-10% saturated-fat comparison; format=number
- calories: Estimated daily energy; format=number

## Formula
Fat grams = calories × fat-energy share ÷ 9; saturated-fat comparison = calories × 10% ÷ 9.

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.

Notice: This estimate does not address fat quality, medical conditions, or individualized nutrition needs.