Will i lose space updating to iOS 11?

I currently have 4.1 gb on m y iphone se how does updating work with storage on iphones, cause currently i have 9.3.3 still from when i got the phone in may, how much space will i lose or something?

It will replace the previous version storage so no harm done. Out with the old in with the new

Whatever the end difference between iOS 11 & 9.3.3 is.

Say iOS 11 was 2300MB (2.3GB) & iOS 9.3.3 was 2000MB (2GB) then you'd lose 300MB (.3GB) when its done.

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