Gym math, done while you chalk up. Pick a calculator, type your numbers, lift.
Your estimated max from any set, straight off the Epley, Brzycki and Lombardi formulas, with a training percentage table underneath.
Target weight in, plates per side out, drawn on the bar in kg or lbs.
Any two of distance, time and pace gets you the third. 5K to marathon presets.
Underbust and bust in inches become a US band size and cup letter, using the modern no-added-inches convention.