Fat Intake Calculator
Calculate daily fat intake targets for your calorie goals and dietary preferences.
Fat Intake Calculator
Calculate daily fat intake targets for your calorie goals and dietary preferences.
Basal Metabolic Rate — Mifflin-St Jeor Equation
ℹ️ Multiply BMR by activity factor: Sedentary ×1.2 | Light ×1.375 | Moderate ×1.55 | Very active ×1.725 | Extra active ×1.9
Disclaimer
Results provided by this calculator are for informational and educational purposes only. They are based on the values you enter and standard formulas, and should not be considered financial, medical, legal, or professional advice. Always consult a qualified professional before making important decisions based on these results. Roughtools makes no warranties regarding the accuracy or completeness of these calculations for your specific situation.
Frequently Asked Questions
Pro Tips
The Mifflin-St Jeor equation used here is the most validated for most adults. But BMR estimates can be off by 10-15% — actual calorie needs require tracking and adjustment.
A calorie deficit of 500/day theoretically produces 1 lb/week of fat loss, but metabolic adaptation slows this over time. Break plateaus with diet breaks and strength training.
Protein has the highest thermic effect of food (20-35% of calories burned digesting it) and preserves muscle during weight loss. Prioritise it to protect your BMR.
Exercise activity is often overestimated. Most fitness apps overcalculate calorie burn. Focus on non-exercise activity thermogenesis (NEAT) — walking, fidgeting, daily movement.
When to Use This Calculator
Calculate your TDEE (BMR × activity) to know your calorie maintenance level before creating a deficit.
Find your calorie maintenance level to add a 200–300 calorie surplus for lean muscle gain.
Adjust calorie needs upward for marathon training or other high-intensity programs where TDEE increases dramatically.
Get a starting calorie target to enter into a food tracking app. Adjust up or down after 2–3 weeks based on results.
Calculate calorie needs during recovery periods when activity level changes, ensuring adequate nutrition for healing.
About the Fat Intake Calculator
This fat intake calculator determines your daily dietary fat target in grams and calories based on your total calorie intake and macronutrient goal, ensuring adequate intake of essential fatty acids while supporting your body composition objectives. Dietary fat is essential for hormone production, fat-soluble vitamin absorption, and brain health — the type of fat matters as much as the amount. See targets for total fat, saturated fat limits, and omega-3 intake.
How to Use the Fat Intake Calculator
- 1
Enter your daily calorie target.
- 2
Select your primary goal (fat loss, muscle gain, athletic performance, or heart health).
- 3
See your recommended daily fat intake in grams and as a percentage of calories.
- 4
Review the breakdown: saturated fat limit, unsaturated fat target, omega-3 recommendation.
- 5
Use as a guideline for food tracking or meal planning.
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