Span is length unit, symbol: [ ]. Definition of 1 span ≡ 9 in. of chiefly historical interest. Compared to metre, span is smaller unit.
• 1 [ ] = (exactly) `0.2286` [m]
• 1 [m] = (exactly) `1/(0.2286)` [ ] = 4.3744531933508 [ ]
Multiply convert of span to common length units:[ ]
Length units sort by name in ABC order
Lide, D. (Ed.). (1990). Handbook of Chemistry and Physics (71st ed). Boca Raton, FL: CRC Press. Section 1.