About TahajjudCalculator
TahajjudCalculator exists for one reason: the promise of the last third of the night is made every night, in every city — but the time it falls is different everywhere, and almost nobody can work it out unaided. We work it out, accurately, in your browser, for free.
What this site does
Every tool here answers a question about the Islamic night. The tahajjud calculator finds tonight's last third from the night between Maghrib and Fajr. The last third calculator goes deeper into the night's three segments; the Islamic midnight calculator finds the night's halfway point; and the wake-up planner turns all of it into a single alarm time. Around the tools sit guides written to be checked: every Quran verse and hadith is cited by source, and our methodology page shows exactly how the times are computed.
How we work
- Accuracy is a trust. The calculation runs in your browser from published astronomical formulas. Before launch we verified our Maghrib and Fajr outputs against reference prayer times for cities around the world; the methods table and the checks are on the How We Calculate page.
- Sources are shown. Religious content carries its references — surah and verse, collection and hadith number — so you never have to take our word for anything.
- No fatwas, ever. Where scholars differ, we present the difference and point you to qualified scholarship. This site calculates times and explains prayers; it does not issue rulings.
- Your location stays yours. Auto-detection happens on your device; coordinates are used in your browser to compute times and are not sent to us. The privacy policy says the same in formal language.
- Free, and staying free. The tools are free for everyone. Readers who find them helpful may support the running costs through the support box on the homepage — entirely optional, never a paywall.
Contact
Questions, corrections, or a time that looks wrong in your city: write to us at hello@tahajjudcalculator.com or via the contact page. Corrections to religious content are treated as urgent — if we have cited something wrongly, we want to know today. Our terms of use set out, in plain language, how far calculated times should be relied on.