I'm looking for a calculator
- that can calculate (basic operations
/would suffice, more are welcome)
- that can calculate including units (e.g.
2m² + 5000cm²)
- can convert units (e.g.
m to ft)
- is gratis
- works on Windows
- starts up quickly and is easy to use
Ideally (but optional)
- is portable
I do not want
- a full-blown mathematics solution like Matlab, Mathematica or similar