Quick answer: Rahu Kaal is a daily period of about 90 minutes that many consider inauspicious for starting important actions. You find it by splitting the time from sunrise to sunset into eight equal parts. The specific part that is Rahu Kaal depends on the weekday. Its clock time therefore changes with the date and place.
Many people in India check Rahu Kaal before signing contracts, starting journeys, or performing ceremonies. The calculation is simple once you know the rule. Below is a clear explanation with examples.
What is Rahu Kaal?
Rahu Kaal (also spelled Rahu Kalam) is the daily period said to be ruled by the shadow planet Rahu. Tradition recommends not beginning auspicious or important activities during this time. You may continue ongoing work and routine tasks. Rahu Kaal is one of several daily timing systems. Others include Gulika Kaal and Yamaganda.
The fastest way to get today’s timing for your city is the free Rahu Kaal calculator. It uses your local sunrise and sunset times.
How to calculate Rahu Kaal
The method has three steps.
- Find your local sunrise and sunset times.
- Divide the total daylight duration into 8 equal parts.
- Pick the part assigned to the weekday (see the table below).
For a standard 6:00 AM sunrise and 6:00 PM sunset, each part is 12 ÷ 8 = 1.5 hours. Real days vary. The window shifts with the seasons and with latitude.
Rahu Kaal by weekday
This is the fixed sequence. Times below assume a 6 AM–6 PM day for illustration only.
| Weekday | Part of day | Approx. window (6 AM sunrise) |
|---|---|---|
| Monday | 2nd | 7:30 – 9:00 AM |
| Tuesday | 7th | 3:00 – 4:30 PM |
| Wednesday | 5th | 12:00 – 1:30 PM |
| Thursday | 6th | 1:30 – 3:00 PM |
| Friday | 4th | 10:30 – 12:00 PM |
| Saturday | 3rd | 9:00 – 10:30 AM |
| Sunday | 8th | 4:30 – 6:00 PM |
A worked example
Say it is Friday. Your sunrise is 6:12 AM and sunset is 6:48 PM. Daylight = 12 hours 36 minutes = 756 minutes. Each part = 756 ÷ 8 = 94.5 minutes. Friday’s Rahu Kaal is the 4th part. It runs from 6:12 AM + (3 × 94.5 min) to 6:12 AM + (4 × 94.5 min). That is about 10:55 AM to 12:30 PM.
What to avoid (and what’s fine)
- Often avoided: weddings, housewarming (Griha Pravesh), starting a business, important travel, signing major agreements.
- Considered fine: continuing existing work, daily chores, and — per many traditions — devotional activity.
Planning a ceremony? Pair this with an auspicious time using the Choghadiya calculator or the Daily Panchang.
Frequently asked questions
How long is Rahu Kaal each day?
About 90 minutes. It is exactly one-eighth of the daylight period. So it varies with the season and your location.
Is Rahu Kaal the same time every day?
No. The part of day is fixed for each weekday. The actual clock time changes daily with sunrise and sunset.
Can I travel during Rahu Kaal?
Tradition advises against starting an important journey during Rahu Kaal. Continuing a trip already underway is usually considered acceptable.
Does Rahu Kaal apply at night?
The common daytime Rahu Kaal is calculated from sunrise to sunset. Some traditions also use a separate night-time calculation that runs from sunset to the next sunrise.
Related guides
Keep exploring related calculators and explainers:
- Shani Sade Sati — Saturn’s 7.5-year transit.
- Mangal Dosha (Manglik) — meaning and remedies.
- Kundali Basics — how a Vedic birth chart is built.
In plain language
What Is Rahu Kaal and How to Calculate It (With Examples) can be understood by starting with the definition on this page. Keep every input in the same unit and check the result against a quick estimate. Use short sentences and one-step checks. That makes the method easier to follow. It also reduces avoidable mistakes.
Limitations and assumptions
Important: This guide about What Is Rahu Kaal and How to Calculate It (With Examples) is for education. It uses the definitions and assumptions shown here. Dates, rates, rules, health facts, and local conditions can change. Verify important decisions with current primary sources or a qualified professional.
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