# Intermittent Fasting Calculator

> Free intermittent fasting and health calculators plus evidence-based articles on fasting, metabolism, body composition, and safe fasting practices. No signup required.

## Tools

- [Intermittent Fasting Calculator](https://intermittentfastingcalculator.org/): Plan fasting windows for 16:8, 18:6, 14:10, 20:4, OMAD, and custom schedules with export options.
- [BMR Calculator](https://intermittentfastingcalculator.org/bmr-calculator/): Estimate basal metabolic rate using Mifflin-St Jeor, Harris-Benedict, and other equations with confidence intervals.
- [TDEE Calculator](https://intermittentfastingcalculator.org/tdee-calculator/): Calculate total daily energy expenditure and daily calorie targets for weight goals.
- [Calorie Calculator](https://intermittentfastingcalculator.org/calorie-calculator/): Estimate maintenance, loss, or gain calories with IF meal split suggestions and calibration guidance.
- [Body Fat Calculator](https://intermittentfastingcalculator.org/body-fat-calculator/): Compute body fat percentage using US Navy, BMI, and Jackson-Pollock 3-site skinfold methods.
- [Water Fasting Weight Loss Calculator](https://intermittentfastingcalculator.org/water-fasting-weight-loss-calculator/): Project weight loss, fat vs. water loss, and metabolic slowdown during a water fast.
- [BMI Calculator](https://intermittentfastingcalculator.org/bmi-calculator/): Calculate body mass index for adults and children using WHO and CDC classification standards.
- [FFMI Calculator](https://intermittentfastingcalculator.org/ffmi-calculator/): Estimate fat-free mass index, normalized score, lean mass, fat mass, and muscularity level.
- [Fasting Time Calculator](https://intermittentfastingcalculator.org/fasting-time-calculator/): Compute fasting duration between start and end times with copy/export options.
- [Intermittent Fasting Timer](https://intermittentfastingcalculator.org/intermittent-fasting-timer/): Track fasting progress in real time, set reminders, and review fasting history.
- [Intermittent Fasting Template](https://intermittentfastingcalculator.org/intermittent-fasting-template/): Build and download a printable PDF fasting schedule for 14:10, 16:8, 18:6, 20:4, or OMAD.

## Articles

- [Is Intermittent Fasting Healthy?](https://intermittentfastingcalculator.org/article/is-intermittent-fasting-healthy/): Evidence-based overview of benefits, risks, and who should avoid intermittent fasting.
- [How to Start Intermittent Fasting](https://intermittentfastingcalculator.org/article/how-to-start-intermittent-fasting/): Step-by-step beginner guide covering fasting methods, hydration, hunger, and routine building.
- [Does Intermittent Fasting Slow Metabolism?](https://intermittentfastingcalculator.org/article/does-intermittent-fasting-slow-metabolism/): Examines research on fasting, metabolic adaptation, and how to protect energy expenditure.
- [How to Know Your Ideal Fasting Time](https://intermittentfastingcalculator.org/article/how-to-know-your-fasting-time/): A practical two-week protocol to find the right fasting window and track signals.
- [Better to Skip Breakfast or Dinner in Intermittent Fasting?](https://intermittentfastingcalculator.org/article/better-to-skip-breakfast-or-dinner-in-intermittent-fasting/): Compares morning vs. evening eating windows with evidence and practical tips.
- [Intermittent Fasting While Breastfeeding](https://intermittentfastingcalculator.org/article/intermittent-fasting-breastfeeding/): Medical guide to risks, safe approaches, monitoring, and nutrition for nursing mothers.
- [What Are the Basic Rules for Intermittent Fasting?](https://intermittentfastingcalculator.org/article/what-are-the-basic-rules-for-intermittent-fasting/): Core rules for choosing a method, honoring eating windows, hydration, and food quality.
- [Why Is 16 Hours the Magic Number for Fasting?](https://intermittentfastingcalculator.org/article/why-is-16-hours-the-magic-number-for-fasting/): Explains the science behind the 16:8 fasting window and its effects.
- [Does the CPB Diet Actually Work?](https://intermittentfastingcalculator.org/article/does-cpb-diet-actually-work/): Evidence-based analysis of the CPB diet, its mechanisms, and limitations.
- [Holy Week Fasting Explained](https://intermittentfastingcalculator.org/article/fasting-holy-week/): Rules and traditions of Holy Week fasting across Catholic and Orthodox practices.

## Legal

- [Privacy Policy](https://intermittentfastingcalculator.org/privacy-policy/): Describes data collection, cookies, analytics, advertising, and user rights.
- [Terms and Conditions](https://intermittentfastingcalculator.org/terms-and-conditions/): Service terms, health disclaimer, acceptable use, and intellectual property policies.

## Key Facts

- Provides free intermittent fasting and health calculators; no account or signup is required.
- Covers fasting schedules including 16:8, 18:6, 14:10, 20:4, OMAD, and custom plans.
- Publishes evidence-based articles on fasting science, metabolism, body composition, and special populations.
- All calculators are educational tools and not a substitute for professional medical advice.

## Contact

- Website: https://intermittentfastingcalculator.org/
- Email: support@intermittentfastingcalculator.org
- Contact page: https://intermittentfastingcalculator.org/contact/