How to Use the Barbell Plate Calculator
Our free barbell plate calculator instantly shows you which plates to load on each side of your barbell for any target weight. Whether you're using Olympic plates (45 lb) or standard plates, our calculator handles the math so you can focus on lifting.
The Plate Loading Formula
Plates per side = (Target Weight − Bar Weight) ÷ 2
This formula calculates the total weight needed on each side of the barbell. The calculator then determines the optimal combination of plates to reach that weight.
Common Plate Configurations
| Total Weight | Per Side | Plates Each Side |
|---|---|---|
| 135 lbs | 45 lbs | 1 × 45 lb |
| 185 lbs | 70 lbs | 1 × 45 lb + 1 × 25 lb |
| 225 lbs | 90 lbs | 2 × 45 lb |
| 275 lbs | 115 lbs | 2 × 45 lb + 1 × 25 lb |
| 315 lbs | 135 lbs | 3 × 45 lb |
Standard Plate Sizes
Pounds (lb)
45, 35, 25, 10, 5, 2.5 lb plates
Kilograms (kg)
25, 20, 15, 10, 5, 2.5, 1.25 kg plates
Pro Tip: Always load plates in descending order (heaviest first, closest to the collar) for better balance and easier plate changes between sets.