Full name: exastadion
Plural form: exastadia
Alternate spelling: exastade
Category type: length
Scale factor: 1.577E+20
The SI base unit for length is the metre.
1 metre is equal to 6.3411540900444E-21 exastadion.
Valid units must be of the length type.
You can use this form to select from known units:
The SI prefix "exa" represents a factor of 1018, or in exponential notation, 1E18.
So 1 exastadion = 1018 stadia.
The definition of a stadion is as follows:
An empirical determination of the length of the stadion was made by Lev Vasilevich Firsov, who compared 81 distances given by Eratosthenes and Strabo with the straight-line distances measured by modern methods, and averaged the results. He obtained a result of about 157.7 metres (172.5 yd).