Work out rahu kaal time instantly with clear inputs, formula shown and shareable results.
The daylight period is divided into eight equal parts and Rahu Kaal occupies a fixed part for each weekday, the second part on Monday, seventh on Tuesday and so on. Because the divisions are fractions of actual daylight, Rahu Kaal is longer in summer and shifts with sunrise rather than sitting at a fixed clock time.
Part length
each part = (sunset - sunrise) / 8
Window
start = sunrise + (part number - 1) x part length
each part = (sunset - sunrise) / 8. The daylight period is divided into eight equal parts and Rahu Kaal occupies a fixed part for each weekday, the second part on Monday, seventh on Tuesday and so on.
Because the divisions are fractions of actual daylight, Rahu Kaal is longer in summer and shifts with sunrise rather than sitting at a fixed clock time.
Enter sunrise as a decimal hour, sunset as a decimal hour, day of the week. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.