The bar counts. A standard Olympic bar weighs 45 lbs (20 kg), so a 225 lb squat is the bar plus 180 lbs of plates, which means 90 lbs per side: a 45 and two 22.5s if you have them, or a 45, a 35, and a 10. Every target weight breaks down the same way: subtract the bar, divide by two, and build that number per side from the plates on your rack.
Simple in principle, annoying under fatigue. Doing plate arithmetic between heavy sets is where loading mistakes happen, and a 10 lb error on one side is how bars tip. A plate calculator removes the arithmetic: enter the target, see the exact plates per side, load, lift.
Fewest plates is usually best: it loads faster, strips faster, and leaves plates on the rack for your next set. BarbellMax's Efficient mode finds that minimal combination from the plates you actually own.
A warm-up should raise your readiness, not spend it. The pattern that works for most strength training:
The mistake to avoid is doing so many warm-up reps that your first work set already feels like the third. Heavier training days need more jumps, lighter days need fewer.
BarbellMax's Warm-up Sets mode builds this progression for you: pick a start weight and how many sets you want, and it spaces the jumps evenly and shows exactly which plates to add and strip at each step. A built-in rest timer keeps you honest between sets.
Warm-ups end where your program begins, and your program weights come from your one rep max. If you have not measured yours, read How to Calculate Your One Rep Max.