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Plate Calculator

Calculate which plates to load on each side of the barbell for your target weight

Example: Loading 225 lb on a 45 lb Bar

To load 225 lb on a standard 45 lb barbell, put 2 x 45 lb on each side (90 lb per side, 180 lb of plates total). Enter your own target weight below to recalculate.

Plate Qty (per side) Weight (per side)
45 lb 2 90 lb

Load Target

Total weight on the bar including the barbell

Weight of the barbell

Enter a target weight to see your plate loading

Fill in the total weight you want on the bar above and the per-side plate breakdown and barbell diagram will appear here instantly.

Loaded Barbell Weight

Exact weight not achievable with standard plates. Showing nearest loadable weight:

Barbell Visualization

Plates Per Side

Plate Qty (per side) Weight (per side)
Total per side

Bar Weight

Plates Total (both sides)

Total Weight

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Standard Plate Weights

Imperial (Pounds)

  • 45 lb - Full-size plate (shown red in the diagram)
  • 35 lb - Full-size plate (shown blue in the diagram)
  • 25 lb - Full-size plate (shown green in the diagram)
  • 10 lb - Smaller plate (shown yellow in the diagram)
  • 5 lb - Small change plate (shown purple in the diagram)
  • 2.5 lb - Fractional change plate (shown gray in the diagram)

Colors here match the loading diagram above. Unlike kg competition plates, lb plates have no universal color standard - most gym 45s are plain black iron.

Metric (Kilograms)

  • 25 kg - Competition plate (Red)
  • 20 kg - Competition plate (Blue)
  • 15 kg - Competition plate (Yellow)
  • 10 kg - Training plate (Green)
  • 5 kg - Change plate (Purple)
  • 2.5 kg - Change plate (Gray)
  • 1.25 kg - Fractional plate (Silver)

Frequently Asked Questions

This calculator uses standard plate sets found in most commercial gyms. If your gym has non-standard plates (such as 55 lb or 100 lb plates), you may need to adjust the results manually. The principle remains the same: load the heaviest plates closest to the center of the bar and work outward with progressively lighter plates.
Weight plates come in fixed increments, and plates must be loaded equally on both sides. The smallest standard increment is 5 lb (2 x 2.5 lb plates) or 2.5 kg (2 x 1.25 kg plates). If your target weight falls between achievable increments, the calculator shows the nearest achievable weight. Consider using fractional plates (0.5-1.25 lb) for more precise loading.
Yes, you should always use barbell collars (clips) to secure the plates, especially during exercises like squats, bench press, and overhead press. Unsecured plates can shift during the lift, causing uneven loading and increasing injury risk. Most standard collars weigh about 0.5 lb each, which this calculator does not account for.
Absolutely. A standard Olympic barbell weighs 45 lb (20 kg) for men's bars and 35 lb (15 kg) for women's bars. Specialty bars like safety squat bars (60-65 lb), trap bars (45-60 lb), and curl bars (15-25 lb) all have different weights. Always verify your bar weight for accurate total load calculations.

Always load plates evenly on both sides and use collars to secure them. Verify actual plate weights, as gym plates can vary by manufacturer.

How to use this calculator

  1. Enter the total weight you want on the bar, including the barbell itself.
  2. Choose your bar weight - 45 lb (20 kg) for a standard men's bar or 35 lb (15 kg) for a women's bar.
  3. Read the per-side breakdown and the barbell diagram. Load the heaviest plates closest to the center and work outward.
  4. If the exact weight is not loadable with standard plates, the calculator shows the nearest achievable weight instead.

What your plate loading means

The result shows the plates to put on each side of the bar and the total loaded weight. Plates load symmetrically, so the smallest standard jump is 5 lb (two 2.5 lb plates) or 2.5 kg (two 1.25 kg plates). Targets that fall between those jumps round to the nearest loadable weight.

Standard collars add roughly half a pound each and are not included in the total. Always clip your collars before lifting so the plates cannot shift.

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