Laghu Samrat Yantra : It is a small sundial at 27° North (Jaipur's latitude) and calculates Jaipur's local time up to an accuracy of 20 second.

Narivalya Yantra : Inclined at 27°, this sundial represents the two hemispheres and calculate time by following the Solar cycle.

Unnatansha Yantra : Was used to calculate the positions of stars and planets at any time of the day or night.

Samrat Yantra : Jai Singh believed that gigantic instruments would give more accurate results. This 23 m high sundial forecasts the crop prospects for the year.

Rashivalaya Yantra : It has 12 structures, each representing a sign of the zodiac and faces a different constellation.

Jai Prakash Yantra : The two sunken hemispheres map out the heavens. It is believed that, it can measure the accuracy of the other instruments.

Ram Yantra : Vertical columns support an equal number of horizontal slabs in the two identical stone structures that comprise this instrument. Its readings determine the celestial arc from horizon to zenith, as well as the altitude of the sun.

Chakra Yantra : A brass tube passes through the centre of these two circular metal instruments. They can be used to calculate the angles of stars and planets from the equator.