Q: Good Developer-based calculator?

[Stingered]

Originally Posted by chants

I suppose a seasoned developer can at least do hex addition and subtraction in the head:
It is obviously for example to see that DEAD+F00D=1CEBA.

As for multiplication, there is always Karatsuba's method.

In all seriousness though if doing a lot of debugging, the mental palette can sure speed things along if you can handle some simple hex computations and with enough experience most people gain some familiarity there.

My norm is this site: https://www.paulschou.com/tools/xlate/

But I'm looking for something to use in a closed ENV.