Need a lightweight calculator for Windows?

Question

Windows

Tell me a simple calculator to quickly open in one click - count - close. No super functionality.

Answer 1

Built -in calc.exethan does not suit?

Answer 2

Once upon a time I used NumLock Calculator, but it has long been abandoned. Called by pressing NumLock. Button behavior is customizable.

Answer 3

The standard calculator is quite good.
And to quickly open - create a shortcut and add a keyboard shortcut for a quick call.