How to calculate missed (qada) prayers: step-by-step guide with example

What is a qada prayer, and why calculate it?

A qada (make-up) prayer is an obligatory (fard) prayer performed after its time has passed because it was missed. Many people who never prayed regularly for years, or who stopped praying for a period, face one question when they return to worship: "how many prayers do I owe?" Knowing your past prayer debt, even roughly, both motivates you and makes it easier to build a steady plan to clear it (for example, a daily make-up target).

This guide explains how to calculate missed prayers with simple logic and, at the end, points you to the calculator on the Prayer Debt home page. The method described here is identical to the logic used by the on-site calculator, so after reading the steps below your results will be consistent when you use the tool. Remember: this is an estimate; sincere intention and effort are what matter most, and for your exact situation be sure to read the caveat at the end.

When does puberty (religious accountability) begin?

Prayer becomes obligatory from the moment a person becomes religiously accountable (mukallaf). The onset of this responsibility is called puberty (bulugh). It is recognized by physical signs of maturity and varies from person to person, so no single fixed age can be imposed on everyone as "the correct" one.

Signs: maturity markers such as wet dreams (ihtilam) in boys and the menstrual period (hayd) in girls indicate that puberty has begun.
If no sign is remembered: according to the relied-upon (mufta bih) view in the Hanafi school, if no sign is known, a maximum limit of about 15 (lunar) years is taken as the basis. In practice, puberty begins earlier for many people (around 12-14, for example).
The app's choice: the calculator lets you enter the puberty age yourself; the default is 13. This value of 13 is only a practical starting (default) value, not a religious measure or threshold. If you remember your own period of maturity, entering that age gives a more accurate result.

In the calculation, puberty date = birth date + the puberty age you enter. Prayer debt begins to count from that date.

How many prayers per day? The Witr and madhhab note

The number of prayers in a day is the most critical point of the calculation. This calculator counts 6 prayers per day:

Fajr (dawn)
Dhuhr (noon)
Asr (afternoon)
Maghrib (sunset)
Isha (night)
Witr

The number 6 here follows the Hanafi school: in the Hanafi view Witr is wajib (necessary) and must be made up when missed, so it is counted as a separate prayer. In the other schools (Shafi'i, Maliki, Hanbali) Witr is considered sunnah; those who follow these schools calculate based on 5 fard prayers per day.

The total make-up count is found by this simple multiplication: number of owed days × 6 (Hanafi). The tool calculates using 6 per the Hanafi approach; if you follow a school that treats Witr as sunnah, you can mentally think in terms of × 5. Note: there are some nuances among Hanafi scholars regarding making up Witr (some consider it sufficient to simply pray Witr again that night); the app adopts the common approach of counting Witr as a separate prayer.

Prayer debt: how to find the number of owed days

The logic is this: the days not prayed between the moment prayer first became obligatory and the date you began praying regularly form the make-up debt.

Number of owed days = (date you started praying regularly − puberty date), in days.
If your date of starting to pray regularly is before puberty, the debt is taken as 0 (it does not go negative).

An important nuance: this method counts every day between puberty and starting regular prayer as debt. If you prayed from time to time during that period, your actual debt may be less, because prayers performed on time are not qada. The tool cannot account for these intermediate periods individually, so the result is an upper bound / estimate.

This number of days is multiplied by the prayers-per-day count above to find the total prayer debt. For example, for someone owing 3,000 days, the Hanafi calculation gives 3,000 × 6 = 18,000 prayers. The numbers may look large, which is why we recommend setting a daily make-up target in a later section. To see your own number in seconds, you can use the missed prayer calculator.

The menstruation (and postpartum) rule for women

There is an important difference in the calculation for women: during menstruation (hayd) and postpartum bleeding (nifas), prayer is not obligatory, and the prayers of those days are NOT made up. This differs from fasting: fasts missed during menstruation are made up later, but prayers are not made up. Therefore these days must be deducted from the debt calculation.

The tool applies this as follows: it finds the approximate number of months within the total owed days and subtracts the average menstruation days for each month.

Days to deduct = round((number of days ÷ 30.44) × average monthly menstruation days) — that is, multiply first, then round to the nearest whole number.
30.44 is the average length of a month in days.
The default average menstruation length is 6 days per month; you can change it to match your own cycle.

This method is an average-based estimate. Your actual menstruation days can vary month to month; if possible, enter the average closest to your own cycle. If you have given birth, postpartum (nifas) days are also deducted from prayer debt, and this period varies from person to person (in the common Hanafi view it can last up to 40 days). The average formula does not reflect nifas days, so someone who has given birth should set the debt somewhat lower. An average may not give the exact number of days; when in doubt, consult a scholar. After this deduction, the remaining number of days is multiplied by the prayers-per-day count (6 for Hanafi).

Step-by-step worked example

Let's see the qada prayer calculation logic with a concrete example. Suppose a female user has:

Puberty age: 13
Time from puberty to starting regular prayer: 10 years
Average monthly menstruation: 6 days

1. Owed days: 10 years ≈ 10 × 365.25 ≈ 3,653 days. (The tool computes the day count directly from the calendar dates, i.e. start date − puberty date; multiplying by 365.25 here is only for a rough manual estimate.)

2. Menstruation deduction: Days to deduct = round((3,653 ÷ 30.44) × 6) = round(120.0 × 6) = round(720.1) = 720 days. Note: multiply first, then round.

3. Net owed days: 3,653 − 720 = 2,933 days.

4. Total make-up (Hanafi, ×6): 2,933 × 6 = 17,598 prayers. In the calculator this number appears as a count of individual prayers; each corresponds to one prayer to be performed. About 2,933 fall to each of the six (Fajr, Dhuhr, Asr, Maghrib, Isha, Witr).

Had the same person been male, there would be no menstruation deduction: 3,653 × 6 = 21,918 prayers. A brief comparison: Woman: 17,598 prayers / Man: 21,918 prayers.

As you can see, the result varies by puberty age, duration, gender, and madhhab preference (whether or not Witr is included).

A plan to clear the debt: daily target and streak

The total may come out high; this is normal and should not discourage you. What matters is a steady pace. Practical suggestions:

Set a daily make-up target: as you pray each fard, add one make-up for that prayer (5-6 extra prayers). For instance, at 6 make-ups a day the 17,598-prayer debt above closes in roughly 8 years (17,598 ÷ 6 ≈ 2,933 days); at 12 a day it drops to about 4 years.
Track your progress: subtracting from the total as you go keeps motivation alive; clearly seeing "how many make-up prayers do I have left" makes the goal concrete.
Keep your streak: make it a habit to close at least one make-up every day; small but uninterrupted steps melt away large debts.
Be flexible: adjust the target to suit you after menstruation ends or during busy periods; consistency matters more than quantity.

The app handles these three things (target, tracking, streak) for you automatically; it is easier than keeping a ledger by hand.

Calculate your own prayer debt

Calculate now: to find your own debt, enter your puberty age, the date you started praying (and, if you are a woman, your average menstruation days) using the missed prayer calculator. To save your result, set a daily target, and track your progress with a streak, download the app: Prayer Debt on the App Store. If you use Android, you can find both store links in the download section.

Important caveat

This calculation is an estimate, not a definitive religious ruling. It can be affected by uncertainty about the puberty date, prayers performed on time during the interim period, the average-based estimate of menstruation/postpartum days for women, and situations such as illness and travel. In particular, if the estimate falls below your actual debt, unpaid debt may remain; so leaning toward consulting a scholar when in doubt is more cautious. For your own specific situation, it is best to consult a qualified scholar, a religious authority (mufti's office), or a local religious authority you trust. The calculation on this site runs entirely on your device. The sincerity of intention and effort comes before any number; do not despair over the past.

Frequently asked questions

How are qada (missed) prayers calculated?

First the puberty date is found (birth date + puberty age). The number of days from puberty to the date of starting regular prayer is the owed days. In the Hanafi approach, this day count is multiplied by 6 prayers per day (including Witr). For women, menstruation days (about 6 per month) are deducted from the total, because prayers are not made up during menstruation. The result is an estimate.

How do I find out how many prayers I owe?

The formula is simple: net owed days × 6 (Hanafi). Net owed days = (date started praying regularly − puberty date) − menstruation/postpartum days for women. Instead of doing this by hand, you can enter your puberty age and start date and see the result in seconds with the free missed-prayer calculator at /#hesapla. The result is shown as a count of prayers.

What should I enter if I don't know my puberty age?

If you remember your sign of maturity (first menstruation for girls, wet dreams for boys), enter that age. If you don't remember, according to the relied-upon (mufta bih) view in the Hanafi school, a maximum limit of about 15 (lunar) years is taken as the basis; in practice puberty is earlier for many people. The tool uses age 13 by default and lets you enter any age. This 13 is not a religious measure, only a practical starting assumption.

Why are 6 prayers counted per day, not 5?

Because the tool follows the Hanafi school, in which Witr is wajib and must be made up when missed. So in addition to the 5 fard prayers, Witr is also counted, making 6. In the Shafi'i, Maliki, and Hanbali schools, Witr is considered sunnah, so the calculation is based on 5 fard prayers per day.

Do women make up the prayers of their menstruation days?

No. During menstruation (hayd) and postpartum bleeding (nifas), prayer is not obligatory, and the prayers of those days are NOT made up later. This differs from fasting: missed fasts are made up, but prayers are not. That is why menstruation (and any postpartum) days are deducted from the total debt in the calculation. This average-based deduction is an estimate.

My total make-up count came out very high — what should I do?

This is very common, and there is no need to despair. Set a daily make-up target (for example, one make-up alongside each fard), track your progress, and keep your streak. With small but uninterrupted steps, large debts close over time. The app manages the target-setting, tracking, and streak features for you.

Is this calculation a definitive religious ruling?

No, the result is an estimate. It is affected by uncertainty about the puberty date, prayers performed on time during the interim period, the average-based estimate of menstruation/postpartum days, and situations such as illness and travel. If the estimate falls below the actual debt, unpaid debt may remain. For your own situation, it is best to consult a qualified scholar, a mufti's office, or a local religious authority you trust.