reckonerBarbell plate calculator
Give it a target and it works out what goes on each side of the bar. It loads heaviest plate first from the plates you tell it you own, so when your gym cannot make the number it says so and gives you the closest weight the bar will take.
Plate calculator
Give it a target and it works out what goes on each side, heaviest plate first, from the plates you actually own. Untick what your gym does not have and it tells you the closest weight the bar will take.
25 · 15 · 1.25
Exact. 3 plates a side on a 20 kg bar.
How to work out what plates to put on a barbell
Take the target weight, subtract the bar, and halve what is left. That number is what each side carries, and the calculator loads it heaviest plate first, the way you would load it by hand. A 100 kg squat on a 20 kg Olympic bar is 40 kg a side, so 25 and 15.
The part most plate calculators skip is what your gym actually owns. Without a pair of 1.25s you cannot make 82.5 kg on a 20 kg bar, and no amount of arithmetic changes that. Untick the plates you do not have and it tells you the closest load the rack will give you, rather than a number you cannot build.
Bar weights are set for the common ones: a 20 kg Olympic bar, a 15 kg women's bar, and a 10 kg training bar. In pounds it swaps to 45, 35 and 15, with plates to match. Change the unit at the top and everything follows.
Reckoner does this on every set, without being asked
You never open these. The plate loading appears under the target on the watch, and the max estimate updates itself after every set you log. Both know your bar and your plates already.