Barbell plate calculator
Which plates to put on each side of the bar for any target weight.
Each side
25 + 15 kg
Total 100 kg
Estimates for healthy adults, not medical advice. If you are pregnant, have a medical condition or a history of disordered eating, speak to a qualified professional first.
Worked example
100kg on a 20kg bar needs 40kg per side: one 25kg and one 15kg plate on each end.
Common questions
- How much does an Olympic bar weigh?
- A standard men’s Olympic bar is 20kg; a women’s bar is 15kg. Technique bars are often 10kg or less.
- Should I count collars?
- Competition collars weigh 2.5kg each; spring clips weigh very little. Most gyms ignore spring clips.
Your next weight, worked out before you reach the bar.
MuscleYou starts from these numbers, then learns from what you actually log — and tells you why every time it changes something.
See your free plan