The calculators that have been provided in this website are things I have thought about while going to the gym or any other form of working out. I have had several times where I am trying to figure out how many of X weights I need to put on the bar to achieve the weight I need. Small calculators like this can help make working out just a bit easier!
If you want to work with a barbell try out the Barbell Achive and Barbell Target apps.
If you want to look into your pacing while running, jogging, walking, or any activity of moving. Check out the Pacing App.
See how your PR stacks by percentage at the Personal Best App.