Ancient units of measurements in trade, commerce and scientific investigations in Hinduism were known as Mana (meaning measure). From ancient times, Hindus had developed many systems of units for the fundamental quantities of length, weight and time. They further divided units for the measurement of other quantities like area, volume and velocity. Explicit references to various types of units are found in the Vedanga Jyotisha (1300 BCE). In fact, the tradition of measurement goes further back to the Indus – Saraswati civilization (3000 BCE). The division marks, on the Lothal ivory scales for the length measurement, are the smallest (1.7 mm) known in the ancient world. Numerous stone weights have been unearthed at Mohenjodaro, Harappa, Kalibangan, etc of this civilization (2600 BCE). From Rig Veda, Ashtadhyayi of Panini, Mahabharata, Yajnavalkya Smriti, Charak Samhita, and Arthashastra of Kautilya we find several units of length and weights. Compared with modern units, one finds