How to use a plate calculator
The target is the complete barbell weight, not the weight of the plates alone. Load the same plates on both sides, secure them with collars if you use them, and confirm the bar's actual weight. Specialty and women's bars can differ from the common 20 kg or 45 lb standard, so switching units resets the bar field to the matching default unless you type your own value.
Practical limitations
This tool uses common commercial-gym plate sizes and aims for the closest load at or below the target. It does not know which plates your gym has, and uncalibrated equipment may alter the total slightly.
Reverse lookup: common loaded weights
| Per side | Total (kg) | Per side | Total (lb) |
|---|---|---|---|
| 10 kg | 40 kg | 20 lb | 85 lb |
| 20 kg | 60 kg | 45 lb | 135 lb |
| 30 kg | 80 kg | 65 lb | 175 lb |
| 40 kg | 100 kg | 90 lb | 225 lb |
| 50 kg | 120 kg | 110 lb | 265 lb |
| 60 kg | 140 kg | 130 lb | 305 lb |
Related tools
Check your target load against the strength standards calculator or build a working-weight chart with the rep-max chart.
Frequently asked questions
- Why did the bar weight not change when I switched units?
- Older plate calculators leave the bar field at its last typed number, which silently mixes 20 kg with pounds. This tool resets the bar to the correct default for the selected unit, 20 kg or 45 lb, whenever you switch, unless you have already typed a specific bar weight.
- Should I add collar weight to the total?
- Only if you actually use collars and want the calculator to account for them. Standard collars add roughly 2.5 lb or 1 kg per pair. Turn the collar toggle on and the tool subtracts that weight before working out the plates, so your final loaded total still matches your target.
- What if my gym does not have every plate size?
- The calculator assumes a standard commercial set. If a size is missing, load the next size down on each side and add change plates such as 1.25 kg or 2.5 lb pairs to close the gap.