Hayd or Istihadha?
Use this calculator to quickly classify your bleeding according to your madhab and see the prayer and fasting rulings that usually follow.
It is most useful when you are asking, "am I in hayd?" or trying to understand the difference between hayd and istihadha before logging your cycle in Sila.
Select your madhab
Each school has different rules for hayd duration and minimum purity.
How it works
- Choose the madhab whose rulings you follow.
- Enter the duration of bleeding and any clean days between episodes.
- The calculator applies the basic hayd and istihadha thresholds for that madhab and returns the likely worship rulings.
Limitations
This tool is a practical guide, not a fatwa. Unusual bleeding patterns, pregnancy or postpartum bleeding, and edge cases can need scholar review. If your situation feels unclear, use the result as a starting point and confirm with a trusted teacher.
Learn the terms behind the result
If you want the definitions behind the calculator, start with the Islamic glossary or go back to the Sila homepage to see how hayd tracking, prayer status, and cycle logging work together.
Want this handled day by day?
Join the waitlist for Sila if you want prayer status, fasting follow-up, and cycle tracking kept together instead of recalculating it each time.