Consult daily Choghadiya and daily Panchang to find daily Rahu Kaal timings.
Each day, Rahu Kaal lasts for one and a half hour; it is among the eight segments of the day that fall between sunrise and sunset. The total time between sunrise and sunset at a given place when divided by eight gives the individual time duration for the eight segments.
Sunrise and sunset moments are considered while calculating geometric values of sunrise and sunset. Refraction is not considered in Geometric sunrise, which is different from Observational sunrise. The latter marks sunrise moments when the upper limb of the Sun becomes visible at the Eastern Horizon, while Geometric sunrise marks sunrise moments when the middle of the Sun is visible at the Eastern Horizon.
Given the difference in local timings of sunrise and sunset for various locations, Rahu Kaal timings and Rahu duration are never the same for two places. Since the sunrise and sunset timings keep changing throughout the year, Rahu Kaal also varies from day to day as it does from place to place. So, it is advisable to look at the time and duration of Rahu Kaal for your geographical location before starting any important work on a given day.