Check this formula below I just got it from google when searching images.
I guess I too use this one as source in the OP, you probably have missed that part.
Thanks OP. It was useful more me 🙂 I left you some reward. Enjoy your 50 merit mark.
My pleasure. Thank you anyway.
Your formula is only accurate for non-segwit (and non-multisig) inputs.
A SegWit input will take up 91 bites and a bech32 input (a different type of SW address that starts with BC1) will take up 68 bites of block space after accounting for the witness (signature) discount.
Please link me toward the calculation of Segwit and bech32 segwit transaction size calculation. Interested to learn it.