All-in-One Mortgage Calculator (Mortgalator) is a "simple yet powerful" utility to calculate mortgage factors.
All the calculations can be read as one single sentence in such a pattern:
If A is $x, B is y% and C is z, then D is m, E is n, etc.
Inputs and outputs can be switched; and you will get whatever you want in just one single view, and actually one single sentence.