What if my target weight can't be loaded exactly?

The 'unloadable remainder' shows any weight left over that the available plate sizes can't make up (common with 1.25 kg-increment targets on a set without a 0.5 kg plate). Round your target to the nearest plate increment if you need an exact load.

Why does it divide by 2 for each side?

A barbell is loaded symmetrically, so only half of (target weight − bar weight) needs to go on each side — the calculator handles that division automatically.

My gym's bar isn't 20 kg or 45 lb — can I still use this?

Yes, set the bar weight field to match your actual bar (e.g. 15 kg technique bars, 35 lb women's Olympic bars, or a fixed-weight gym bar) and the per-side plate math adjusts accordingly.

Plate Loading Calculator

Work out exactly which plates to load on each side of the bar to hit a target barbell weight, in kg or lb plate sets.

Loading tool…

Formula: Per-side weight = (target weight − bar weight) ÷ 2, filled greedily from the largest available plate down

Worked examples

100 kg target on a 20 kg bar
A standard metric Olympic bar loaded to 100 kg using the common 25/20/15/10/5/2.5/1.25 kg plate set.
225 lb target on a 45 lb bar
A classic '2 plates a side' US gym target using standard 45/35/25/10/5/2.5 lb plates.
60 kg target on a 15 kg training bar
A lighter technique or warm-up bar, showing the calculator handles non-standard bar weights.

What this tool does

Loading a barbell to an exact target weight means solving a small puzzle: which plates, in which combination, on each side of the bar. This calculator does that math for you — enter a target weight and your bar weight, and it returns the specific plates to slide on per side, using standard metric (kg) or imperial (lb) plate sets.

How the loading works

The calculator first subtracts your bar weight from the target and divides by two, since a bar is loaded symmetrically and only half the extra weight goes on each side. It then works greedily from the largest plate in your unit's standard set down to the smallest — filling as much of the per-side weight as possible with big plates before moving to smaller ones, exactly the way most lifters load a bar by hand. Any small amount left over that the available plate sizes can't make up exactly is reported separately as an "unloadable remainder."

Standard plate sets used

Metric: 25, 20, 15, 10, 5, 2.5 and 1.25 kg plates, the typical set found on Olympic bars outside the US.
Imperial: 45, 35, 25, 10, 5 and 2.5 lb plates, the standard US commercial-gym set.

Switch the units toggle to match your gym, and adjust the bar weight field if your bar isn't the common 20 kg (44 lb) men's Olympic bar or 45 lb US bar — many gyms also have 15 kg technique bars, 35 lb women's Olympic bars, or fixed-weight bars that don't match either default.

How to use the result

Read the plate table from the top down: it lists each plate size you need and how many go on each side (the bar takes two of each, one per side, for balance). The "total loaded weight" confirms what the bar actually adds up to once loaded, which should match your target unless the remainder field shows a nonzero leftover — in that case, round your target to the nearest amount your plates can actually produce, or check whether you have the smaller plate sizes (2.5 kg / 1.25 kg, or 2.5 lb) needed for finer jumps.

Why this is useful

Plate math sounds trivial until you're mid-workout doing it under fatigue, or programming percentage-based work where every set targets a slightly different weight. This is also a genuinely underserved niche online — most tools for barbell loading live inside gym apps rather than as a quick web calculator, which is exactly the gap this fills.

Limits

This assumes standard, commonly available plate sizes; it does not account for fractional "micro-plates" some gyms stock (0.5 kg or 1.25 lb add-ons) unless you adjust your target to compensate. It's a loading aid, not training advice — always use collars to secure plates and load/unload a bar evenly to avoid it tipping.

Frequently asked questions

How does the calculator pick which plates to use?: It works greedily from the largest plate in your unit's standard set down to the smallest, filling as much of the per-side weight as possible before moving to the next size — the same way most lifters load a bar by hand.
What if my target weight can't be loaded exactly?: The 'unloadable remainder' shows any weight left over that the available plate sizes can't make up (common with 1.25 kg-increment targets on a set without a 0.5 kg plate). Round your target to the nearest plate increment if you need an exact load.
Why does it divide by 2 for each side?: A barbell is loaded symmetrically, so only half of (target weight − bar weight) needs to go on each side — the calculator handles that division automatically.
My gym's bar isn't 20 kg or 45 lb — can I still use this?: Yes, set the bar weight field to match your actual bar (e.g. 15 kg technique bars, 35 lb women's Olympic bars, or a fixed-weight gym bar) and the per-side plate math adjusts accordingly.

These calculators give general estimates from published formulas. They are not medical advice and do not account for your individual health; talk to a qualified professional before changing your diet or training.