How to use this calculator
Enter your target total weight in the input field. This is the weight you want on the bar including the bar itself. For example, if you want to squat 225 lbs, enter 225. The calculator subtracts the bar weight automatically and divides the remaining weight evenly across both sides.
Select your unit system (pounds or kilograms) and barbell type. The standard men's Olympic barbell weighs 45 lbs (20 kg), the women's bar weighs 35 lbs (15 kg), and training bars weigh approximately 15 lbs (7 kg). Choosing the correct bar ensures accurate plate calculations.
The results show which plates to load on each side of the bar, listed from heaviest (closest to the center) to lightest (on the outside). If your target weight cannot be reached exactly with available plate denominations, the calculator displays the closest achievable weight and the difference.
How plate loading works
When someone says they bench 225 lbs, that total includes the barbell itself. A standard Olympic barbell weighs 45 lbs (20 kg), so to reach 225 lbs you need to add 180 lbs of plates total, which is 90 lbs on each side. That works out to two 45 lb plates per side.
Always load plates from heaviest to lightest, placing the heaviest plates closest to the center of the bar. This keeps the weight balanced and makes it easier to slide plates on and off. Use collars (clips) to secure the plates and prevent them from sliding during your lift.
Because plates come in fixed sizes and both sides must be equal, you cannot hit every possible number. With standard 2.5 lb plates as your smallest increment, the minimum jump is 5 lbs total (2.5 per side). Fractional plates or change plates can help you make smaller jumps when needed.
Frequently asked questions
How much does a barbell weigh?
A standard men's Olympic barbell weighs 45 lbs (20 kg) and is 7.2 feet long. The women's Olympic barbell weighs 35 lbs (15 kg) and is shorter with a slightly thinner grip diameter. Training or technique bars weigh around 15 lbs (7 kg) and are used for learning Olympic lifting movements.
What plates do I need for 135, 185, 225, and 315 lbs?
With a 45 lb bar: 135 lbs is one 45 per side. 185 lbs is a 45 plus a 25 per side (or a 45 plus two 10s and a 5). 225 lbs is two 45s per side. 315 lbs is three 45s per side. These are the standard benchmark weights most lifters work toward.
What is the difference between kg and lb plates?
Kg plates come in 20, 15, 10, 5, 2.5, and 1.25 kg sizes and are the standard for Olympic weightlifting and international competition. Lb plates come in 45, 35, 25, 10, 5, and 2.5 lb sizes and are more common in American commercial gyms. The denominations do not convert perfectly between systems, so mixing kg and lb plates on the same bar is not recommended.
Why can't I hit the exact weight I want?
Since you must load the same plates on each side, the total added weight must be an even multiple of your smallest plate. With 2.5 lb plates, you can only add weight in 5 lb steps. If you need finer increments, consider buying fractional plates (1.25 lb, 0.5 lb) or micro plates, which are popular for progressive overload on pressing movements.