Kaal sarp yog or kal sarp dosh is malefic astrological combination of planets in a person's birth chart which has detrimental effect. This is an online kaal sarp yog calculator to determine whether you have this sarp dosh in your horoscope. A person is said to have Kaalsarp dosh when all the 7 planets in his birth chart are place between Rahu and Ketu.
What is Kalsarpa Yoga?
When all the prime planets (Sun, Mercury, Venus, Mars, Jupiter, Saturn, Moon) are placed between Rahu & Ketu the kundali is said to have the Kalsarpa Yoga. This yoga is considered harmful by some astrologers.