Calculator
Barbell plate calculator
What to load per side — and, when the number will not load exactly, what you will actually be lifting.
How it is calculated
Standard competition bars are 20 kg for men and 15 kg for women; most commercial-gym bars are 20 kg, and a 45 lb bar is 20.4 kg, not 20. The calculator assumes a full set of plates down to 0.25 kg.
When a target cannot be loaded exactly, this tool tells you rather than quietly rounding. Being told "you asked for 102.5 and the bar says 100" is the entire point.