Re: My calculator is out of date
You aren't really paying attention, are you. There's no choice involved (or rather, it's already decided that there won't be any, really soon):
"On 16 November 2018, the International Bureau of Weights and Measures (BIPM) voted to redefine the kilogram by fixing the value of the Planck constant, thereby defining the kilogram in terms of the second and the speed of light. Starting 20 May 2019, the new value is exactly h = 6.62607015 × 10^-34 J ⋅ s"