Barbell Plate Loading Calculator
Wondering what plates to load for your next set? This free barbell plate calculator tells you exactly which plates to put on each side of the bar to hit any target weight. Enter the total weight, your bar's weight, and the plates your gym has — get the per-side breakdown instantly, in lb or kg.
Enter your numbers
Your results
Enter your target weight to see what plates to load.
How to use this calculator
Enter the total weight you want (including the bar) and the bar's weight — 45 lb for a standard Olympic bar, 20 kg if you train in kilos. Then tick off the plate sizes your gym actually has; uncheck any it lacks. Your results update instantly as you type.
The results show the exact plates per side, the total plates you need, and the loaded total. If your plate set can't hit the target exactly, you'll see the closest loadable total below it plus the shortfall, so you can adjust up or down without guessing.
How it works
The math is simple. First, subtract the bar from the target, then divide by two — because a barbell is loaded symmetrically, each side must carry the same weight:
- Weight per side = (target − bar) ÷ 2. For 225 lb with a 45 lb bar: (225 − 45) ÷ 2 = 90 lb per side.
Then the calculator greedily picks the largest available plate that fits, takes as many of it as possible, and repeats with the next size down. For 90 lb per side with standard plates: two 45 lb plates fit exactly, so the answer is 2 × 45 lb per side.
Assumptions: identical plates go on both sides (collars, at roughly 2.5 lb each, are not counted); standard Olympic plate sets are 45/35/25/10/5/2.5 lb or 25/20/15/10/5/2.5/1.25 kg. If a remainder can't be made from your checked plates, the calculator reports the closest reachable total below your target rather than inventing plates.
Frequently asked questions
What plates do I need to load 225 lb?
With a standard 45 lb Olympic bar, add 90 lb to each side — that is 2 x 45 lb plates per side. Bar (45) + plates per side (2 x 45 = 90, x 2 sides = 180) = 225 lb. This is the classic 'two plates' bench press and the default answer this calculator gives.
Why are barbell plates counted per side?
A barbell is loaded symmetrically — identical plates go on each end — so lifters describe a load by the plates on one side. 'A plate' means one 45 lb plate per side, or 135 lb total; 'two plates' is 225 lb; 'three plates' is 315 lb; 'four plates' is 405 lb.
What if my gym does not have the exact plates to hit my target?
Then no exact combination exists, and this calculator will show the closest loadable total below your target plus the shortfall. In the gym, the common fix is to load slightly lighter with the plates you have, or make up the difference with small change plates (2.5 lb / 1.25 kg) if your gym has them.
Do I include the bar's weight in the total?
Yes — barbell loads are always stated as the total weight including the bar. A standard Olympic bar weighs 45 lb (20 kg). So when someone says they squat 225, the bar accounts for 45 of those pounds and the plates add 180.
Which plate goes on the bar first?
Load the heaviest plates first, closest to the center of the bar, then work outward to the lightest. This keeps the load stable and makes it easier to slide smaller plates on and off. Always finish with collars so nothing slides mid-lift.