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Iddah Period Calculator | Divorce, Widowhood & Pregnancy

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An iddah calculator estimates the end date of the Islamic waiting period after divorce or widowhood from the start date and situation: three menstrual cycles (≈3 lunar months, 89 days) after divorce, four lunar months and ten days (130 days) for widowhood per Surah al-Baqarah 2:234, or until delivery for pregnancy per Surah at-Talaq 65:4.

Last updated: September 2026 · Free · No sign-up required

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Results

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Quick reference

Summary table:

SituationLengthBasis
Divorce (menstruating)3 cycles ≈ 89 days2:228
Divorce (no menses)3 lunar months ≈ 89 days65:4
Widowhood4 lunar months + 10 days ≈ 130 days2:234
PregnancyUntil delivery65:4

calendar_month Lunar counting

Widows' iddah uses true lunar months (29.5 days each) — four months plus ten days ≈ 130 calendar days.

medical_information Cycles, not calendar

For a menstruating divorcee the iddah is three actual cycles; the 89-day figure is only an approximation for planning.

child_care Pregnancy overrides

A pregnant woman's iddah ends only at delivery — even if that takes longer than the divorce iddah would have.

home During iddah

Widows observe iddah in the marital home; divorcees in the revocable (talaq raj'i) case stay as a wife, per fiqh details.

lightbulb A real example — divorce iddah from 1 September 2026

Divorce pronounced 1 Sep 2026; regular cycles; planning estimate.

Result: Three lunar months ≈ 29 November 2026 (89 days) as an estimate; her actual end date is the start of the third complete cycle.

What this means: Because the count follows real cycles, irregular cycles change the answer — the estimate is for planning, the scholar's ruling is authoritative.

Formula & methodology

Formula: Divorce: 3 lunar months (89 days) from notification; Widowhood: 4 lunar months + 10 days (130 days); Pregnancy: until delivery

The four iddah situations

  • Divorced, menstruating: three full menstrual cycles (Surah al-Baqarah 2:228). The calendar approximation counts three lunar months ≈ 89 days; the actual count follows your cycles.
  • Divorced, not menstruating (menopause, illness): three lunar months (Surah at-Talaq 65:4) ≈ 89 days.
  • Widow: four months and ten days (Surah al-Baqarah 2:234) — counted lunar, ≈130 days.
  • Pregnant: until delivery, however long (Surah at-Talaq 65:4) — no date can be fixed.

Lunar months begin from the moment of divorce or death, not from the next calendar new moon. This calculator gives planning estimates; for binding rulings consult a qualified scholar, since cycle irregularity and fiqh differences affect the answer.

Frequently asked questions

How long is iddah after divorce?
Three full menstrual cycles for a menstruating woman — roughly three lunar months (about 89 days). If she does not menstruate, three lunar months directly.
What is the iddah period after a husband's death?
Four lunar months and ten days (Surah al-Baqarah 2:234) — about 130 days — regardless of whether she menstruates.
When does the iddah clock start?
From the moment the divorce is pronounced or the death occurs — not from the next new month or from the paperwork.
What if a divorced woman is pregnant?
Her iddah lasts until she delivers (Surah at-Talaq 65:4), which replaces the three-cycle count entirely, however long the pregnancy runs.
Are iddah months counted as lunar or calendar months?
Classical sources count lunar months, which is why the tool's 89-day and 130-day figures are planning approximations rather than exact rulings. In practice the precise end date follows the Hijri calendar and local scholarly guidance. Confirm the exact date with a qualified scholar or your local mosque.
Does iddah apply if the marriage was not consummated?
Rulings differ between schools of thought on this point, and may also depend on the type of divorce. Because the answer varies, this is a question for a qualified scholar who knows your circumstances — the calculator's standard figures assume a consummated marriage.
Can a woman remarry during iddah?
No — remarriage takes place after the waiting period completes. The iddah must fully elapse first, whether counted by cycles, months or delivery. Anyone unsure of the exact end date should confirm it with a scholar before proceeding.
How do I count three cycles if my cycles are irregular?
You count your actual cycles, however long or irregular they are — irregularity simply extends the waiting period. The tool's 89-day approximation assumes regular lunar-length cycles and cannot substitute for real cycle counting. A scholar can advise if cycles stop or become unclear.

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