Fasting Days Calculator
Turn your missed Ramadan fasts into a clear, day-by-day Qaḍā’ schedule in seconds.
This Fasting Days Calculator runs entirely on your device — no account, no data sent anywhere, ready the moment the page loads.
Build Your Qaḍā’ Fasting Schedule
What Is a Fasting Days Calculator?
A Fasting Days Calculator is a planning tool that converts the number of Qaḍā’ (make-up) fasts you owe into a concrete, dated schedule. Instead of guessing which upcoming days are free and permissible for fasting, the calculator does the counting for you — spacing your chosen fasting days across the calendar while steering clear of days when fasting is not allowed, such as Eid al-Fitr and the Days of Tashrīq.
Whether you missed fasts due to travel, illness, pregnancy, nursing, or menstruation, a Fasting Days Calculator keeps the obligation visible and trackable rather than an open-ended mental tally.
How This Fasting Days Calculator Works
- Enter your missed days. Type in the total number of fasts you owe.
- Pick your fasting weekdays. Choose the days that realistically fit your routine.
- Set a start date. The calculator begins scheduling from that day forward.
- The engine checks the Hijri calendar. A local date-conversion engine flags Eid al-Fitr and the Tashrīq days so they’re automatically skipped.
- Your schedule appears instantly. Copy, print, or download it — no data ever leaves your browser.
What Should a Fasting Days Calculator Include?
- A clear count of remaining missed fasts
- Flexible weekday selection matching real life (work, school, energy levels)
- Automatic avoidance of prohibited fasting days (the two Eids, Tashrīq)
- An exportable, printable schedule you can reference offline
- No account, tracking, or data collection
Worked Example
Suppose you owe 6 missed fasts, choose Monday and Thursday, and start from a date with no upcoming Eid conflicts. The Fasting Days Calculator produces:
| # | Date | Weekday |
|---|---|---|
| 1 | Mon, 2 Nov 2026 | Monday |
| 2 | Thu, 5 Nov 2026 | Thursday |
| 3 | Mon, 9 Nov 2026 | Monday |
| 4 | Thu, 12 Nov 2026 | Thursday |
| 5 | Mon, 16 Nov 2026 | Monday |
| 6 | Thu, 19 Nov 2026 | Thursday |
Who Uses a Fasting Days Calculator?
New & Recovering Fasters
Anyone catching up after illness or travel gets a realistic, spaced-out plan.
Mothers & Nursing Parents
Track larger totals of missed fasts across the year without losing count.
Students & Professionals
Fit make-up fasts around exams or work using only the weekdays that work.
Anyone Before Next Ramadan
Use the deadline-aware plan to finish Qaḍā’ fasts before the next Ramadan begins.
Best Practices for Using This Calculator
Spread fasts out rather than clustering them if your schedule allows, and try to finish all owed fasts before the next Ramadan begins, since delaying without a valid excuse carries additional rulings. For a detailed explanation of the deadline and what happens if make-up fasts are delayed, see this scholarly answer from IslamQA on making up missed fasts before the next Ramadan.
Common Mistakes to Avoid
Fasting Days Calculator — FAQ
Is this Fasting Days Calculator free to use?
Yes. The Fasting Days Calculator is completely free, requires no sign-up, and runs directly in your browser.
Does the Fasting Days Calculator use AI?
No. It uses a local, rule-based date and scheduling engine rather than a live AI call, so it works instantly and never sends your data anywhere. A secure backend could be connected later if needed.
Which days does the Fasting Days Calculator skip automatically?
When enabled, it skips Eid al-Fitr and the Days of Tashrīq (11th–13th Dhū al-Ḥijjah), since fasting is prohibited on those days.
Can I choose fewer than two fasting days per week?
Yes, the Fasting Days Calculator lets you select any combination of weekdays, from one day to every day.
Is my data saved anywhere?
No. Everything the Fasting Days Calculator generates stays in your browser and is never uploaded or stored.
What if I owe fasts from more than one Ramadan?
Simply enter the combined total number of missed days, and the calculator will lay out a single continuous schedule for all of them.
Related Reading
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Use the Fasting Days Calculator above to build your personal Qaḍā’ schedule in under a minute.
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