The default Windows calculator is a decent program that, aside from basic math, can perform binary and hexadecimal calculations, Boolean arithmetic, handle trigonometric and logarithmic functions, and perform statistical analysis. It can also convert measurement units, calculate calendar dates, and figure out your mortgage, vehicle lease and fuel economy. It’s an all-round multipurpose calculator that should be enough for most people. You can still pick at it, if you want to. For instance, you can argue that there is no way to save history or a session. After trying out several different calculators, I rounded up three programs that in my opinion, are a tad better than the default Windows calculator.