A megastud is a unit of length equal to one million studs or 1,000 kilostuds. It is used for measuring large distances, such as the length of major highways, the distance between planets (astronomical units are more commonly used), or the diameter of large celestial bodies. For example, the distance from Ro-London to New Blockers City is approximately 6 megastuds, and from Roghija to Bloxburg is approximately 8.8 megastuds. Tovokian Federation, the widest country, spans about 9 megastuds while the perimeter of Tovokia is about 12 megastuds.
It used to be defined as 50 kilometers in 2011 before it was redefined as 280 kilometers in 2019.