🧈 Fat Intake Calculator
Fat is the most energy-dense macro at 9 kcal per gram — more than double protein or carbs — so small gram changes swing your calories a lot. This calculator converts your chosen fat percentage into the grams you actually measure.
Moderate diets land around 25–35% of calories from fat; keto pushes past 60%. Whatever your approach, the gram target keeps portions honest.
How to use this calculator
Enter your daily calories and the share you want from fat, and the tool converts it to grams per day.
- Enter your Daily calories in the kcal field.
- Enter the Fat share as a percentage.
- Read the headline fat-per-day figure in grams.
- Check the fat calories row underneath for reference.
Frequently asked questions
How does the conversion work?
It multiplies your calories by the fat percentage and divides by 9, since fat provides 9 kcal per gram. At 2,500 kcal and 30 percent fat that is 750 divided by 9, or about 83 g.
What fat percentage should I choose?
Moderate diets usually sit at 25 to 35 percent, low-fat plans drop toward 20 percent, and keto pushes past 60 percent. Keep at least 20 percent for hormone health unless a clinician says otherwise.
Does the type of fat matter?
Yes. Favor unsaturated fats from olive oil, nuts, fish and avocado, and keep saturated fat modest. The gram target controls quantity; food choice controls quality.
Why is fat so easy to overeat?
At 9 kcal per gram it is more than twice as energy-dense as protein or carbs, so small extra portions add up fast. Measuring against a gram target keeps portions honest.