For an in hand calculator, consider "iDrag" by Vincent Pizzo on the iPhone/iPod Touch. Tons of stuff in there to estimate results you are speaking of. Also look at "Garage Buddy" by Turtle Rock Studios.
When I was in Geodetic Survey School in 1984, I looked at the bottom of the T-3 Theodolite and noticed the 1963 Mfg Date. I asked SGT Bethea (our Instructor) about the technology level we were learning. His response was something along the lines of "Pvt, you are learning on state of the art equipment", and smiled.