Is there such a thing as a ‘mortgage offset account’ calculator?

I would like to know if anyone has come across a mortgage calculator that allows you to calculate the money that goes on and off an offset account linked to a mortgage.

What would you want the calculator to do? Mortgage offset account is simply a loan tied to an account at your bank such as a savings account.

You can check out some calculators here. http://www.mortgagesum.com/mortgagecalculator/

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