Barbell Plate Calculator
Work out which barbell plates to load for a target weight.
Loading the bar without the mental maths
Loading a barbell to a target weight means working out which plates to put on each side, accounting for the bar's own weight — quick maths that is surprisingly easy to fumble mid-session. This works out the plates to load for a target weight, so you get it right without counting.
Enter the target weight and bar to see the plates per side.
Per side, and the bar counts
Two things trip people up loading a bar. First, plates go on both ends, so each side takes half the weight you are adding to the bar — a common source of error when tired. Second, the bar itself weighs a significant amount, which must be subtracted from the target before working out the plates, or you overload every lift. A good plate calculation handles both, showing what to put on each side using the largest plates first, which is how you load efficiently. It is a small convenience that removes a genuine, easy-to-make mistake, especially useful as fatigue sets in during a session and mental arithmetic gets harder.
Common questions
Why is loading a barbell error-prone?
Plates go on both ends, so each side takes half the added weight, and the bar's own weight must be subtracted first — easy to fumble when tired.
Does it account for the bar's weight?
Yes — it subtracts the bar before working out the plates, so you do not overload every lift, and shows what to load per side.
Is my data uploaded?
No. The calculation happens in your browser.