5:2 intermittent fasting
A weekly pattern with five usual eating days and two days of reduced intake. It is not a five-hour fast or a two-hour eating window.
5:2 is a weekly pattern with two reduced-intake days. See its limits, example structure and how it differs from a daily fasting calculator.
- No app
- No account
- Not medical advice
By FastWindowTimer · Published: 2026-06-21 · Content updated: · Not individually medically reviewed — see editorial policy
Example schedule
Monday and Thursday — example reduced-intake days
Two non-consecutive days; this page does not prescribe an energy target.
Other five days — usual meals
A weekly structure, not permission to overeat or a personalized menu.
Planning considerations
- Monday and Thursday illustrate two non-consecutive reduced-intake days.
- Use this page to compare timing constraints; suitability requires your own circumstances and, when needed, professional advice.
Practical tradeoffs
Practical use
- Separates a weekly plan from daily clock-based schedules.
Constraints
- Reduced-intake days involve dietary decisions that a time calculator cannot personalize.
- Do not alter prescribed medication or ignore symptoms to complete a window.
Sources
- Cleveland Clinic — What Is Intermittent Fasting? (opens in a new tab)
What this source supports: Describes daily time-restricted eating and the weekly 5:2 pattern. The example clock times on this page are arithmetic illustrations. It is background context, not a trial of this exact schedule.
What it cannot establish: Does not demonstrate that a longer fasting window is better or establish individual suitability.
Source checked:
- Cleveland Clinic — 6 Tips for Fasting Safely (opens in a new tab)
What this source supports: Discusses planning, hydration, medication and avoiding extreme fasting.
What it cannot establish: General clinical education, not approval of this exact schedule for the reader.
Source checked:
Frequently asked questions
- Will the calculator build a 5:2 meal plan?
- No. It calculates daily time windows, not weekly energy targets or menus. Discuss a reduced-intake plan with a qualified professional; this page does not prescribe a calorie target.
- What does this schedule tell me about my body?
- Only the intended eating and fasting times. It does not measure insulin, ketones, autophagy, or the nutritional adequacy of your meals.
- What if the schedule does not fit my day?
- Choose a wider eating window or regular meal times. You do not need to compensate for a missed target by extending the next fast.