Barbell Plate Calculator

It subtracts the bar weight from your target and splits the remainder evenly across both sides, so the weight per side is (target minus bar) divided by 2. It then loads plates from heaviest to lightest until it reaches that side weight, since a barbell is loaded symmetrically and each plate size is added one per side.

Loading the largest plates first uses the fewest plates and matches how lifters actually load a bar. For the standard lb set (45, 35, 25, 10, 5, 2.5) and kg set (25, 20, 15, 10, 5, 2.5, 1.25), this greedy approach also reaches the closest achievable weight at or below your target, because every plate size divides cleanly into the larger ones.

You can only load whole plates, so some targets fall between two loadable weights. The calculator then shows the closest total at or below your target and how many pounds or kilograms short it is. Add a smaller plate, such as a 1.25 lb or 0.5 kg micro plate, or nudge the target to close the gap.

Yes. Use the plates available per side field to cap how many of each size you have on hand. The loader respects that limit and reaches the best weight it can, which is useful for home gyms where you might own only one or two pairs of each plate.

A standard Olympic barbell weighs 45 lb (about 20 kg). The calculator defaults to 45 lb in pounds mode and 20 kg in kilograms mode, but you can enter any bar weight, including a 35 lb women's bar, a 15 kg bar, or a fixed-weight bar.

No. The plate counts shown are per side, the way you load a real barbell. If the result says two 45s, you place two 45 lb plates on the left and two on the right, for four plates total. The total plate count reported at the top already adds both sides together.