Plate Loading Calculator
Which plates go on each side of the bar to hit your target weight, no between-set arithmetic.
Fill in the form and your result lands here.
Learn the details
This tool works out the plate combination for each side of the bar, accounting for bar weight (typically 45 lbs / 20 kg). It fills from the largest available plates down to the smallest.
Nobody is bad at maths. It is that plate maths happens in a busy gym with 60 seconds of rest left, and the numbers are arranged to trip you up. Here it is laid out so you never have to think about it again.
The one thing that trips everyone up
Plates load per side. Bar weight is the total. That mismatch causes nearly every loading error I see. If a program says 185 pounds, that is what the whole loaded bar weighs, bar included, so take the bar off first and split what is left between two sides. When someone says they put "two 45s on", they almost always mean two per side, which is four plates. Say the number out loud as a total and the confusion mostly goes away.
Bars and plates, in both units
A standard men's Olympic barbell is 45 pounds, or 20 kilos. Women's bars are 35 pounds or 15 kilos, and technique bars, EZ bars and Smith machine sleeves are their own thing. Check yours rather than assuming.
- Pounds: 45, 35, 25, 10, 5, 2.5
- Kilos: 25, 20, 15, 10, 5, 2.5, 1.25
Because every plate goes on twice, the smallest jump in a pound gym is 5 pounds total, and 2.5 kilos in a metric one.
A worked example
Target 225 pounds on a 45 pound bar. Subtract the bar and you have 180 pounds of plate, or 90 per side. Ninety is two 45s, so the tool reports a total weight on bar of 225 and a per side line of 2x45. Memorise that one alongside 135 and 315, one plate and three plates a side, and you have covered a lot of normal training.
When your target is not makeable
Ask for 137 pounds on a 45 pound bar and the maths wants 46 a side. A 45 leaves one pound, which nothing in a standard set covers, so the tool shows 135 as the closest achievable weight and tells you 137 is not reachable. That is the gym's resolution, not a failure. Micro plates fill the gap: pairs of 1.25, 1, 0.75 or 0.5 pounds, or 0.5 and 0.25 kilos, let you add 1 to 2 pounds to a total instead of 5. Cheap, bag-sized, and the quietest way to keep progressive overload going on presses.
Loading it properly
Load symmetrically and check both ends before you get under the bar. Biggest plates first, closest to the collar, smaller ones outside them. Then actually use collars, especially overhead or on a bench, because an unbalanced bar sheds plates from one side and the other end follows. For a sensible number to load, work back from your one-rep max and build up with a warm-up ladder rather than jumping straight to your working set.
Load the largest plates closest to the collar for bar stability. Memorize the combinations for your most-used weights.