How do I calculate plates per side?

Subtract the bar weight from your target total, then divide by two — that's the load for one side. Fill it from the heaviest plate down: for 225 lb on a 45 lb bar, (225 − 45) ÷ 2 = 90 lb per side, which is two 45s.

How much does a standard barbell weigh?

A men's Olympic barbell is 45 lb (20 kg). Women's Olympic bars are 35 lb (15 kg), and many training or technique bars are 15 lb (10 kg). Pick your bar in the calculator so the plate math is correct.

Why can't I make some exact weights?

Plates come in fixed denominations, so some totals aren't loadable. The smallest standard jump is 2.5 lb per side (5 lb total) or 1.25 kg per side (2.5 kg total). If a target falls between those, the calculator shows the closest loadable weight and the leftover.

What plates should a home gym have?

A practical lb set is pairs of 45, 25, 10, 5 and 2.5; in kg, pairs of 20, 15, 10, 5, 2.5 and 1.25. The smaller plates and micro/fractional plates let you make small progressions.

Does the calculator count both sides?

Yes. The per-side list is what you load on one end; the loadable total already includes the bar plus the matching plates on both sides.

Barbell Plate Calculator

This barbell plate calculator works out exactly which plates to load on each side of the bar to hit any target total — in pounds or kilograms, for whichever bar you're using.

How it works

A barbell is loaded symmetrically, so the calculator first subtracts the bar weight from your target and splits the rest between the two sides:

per side = (target − bar) ÷ 2

It then fills each side greedily from the heaviest plate down. If the remaining weight can't be matched by any plate in the set, that amount is reported as leftover and the calculator shows the closest weight you can actually load.

Worked example

Target 225 lb on a 45 lb bar: (225 − 45) ÷ 2 = 90 lb per side. Ninety pounds is exactly two 45 lb plates, so you load two 45s on each end — a total of four 45s plus the bar.

Standard plate denominations

The denominations this calculator loads from:

Pounds (lb)	Kilograms (kg)
45	25
35	20
25	15
10	10
5	5
2.5	2.5
—	1.25

The smallest loadable jump is 5 lb total (2.5 lb/side) or 2.5 kg total (1.25 kg/side). Micro plates let you make smaller steps.

Reading the result

The big line is the plate list for one side of the bar — load the same on the other end. The loadable totalis the weight you'll actually be lifting once both sides and the bar are counted. Use the Warm-up Calculator to build up to it, then check your one-rep max.

Frequently asked questions

How do I calculate plates per side?: Subtract the bar weight from your target total, then divide by two — that's the load for one side. Fill it from the heaviest plate down: for 225 lb on a 45 lb bar, (225 − 45) ÷ 2 = 90 lb per side, which is two 45s.
How much does a standard barbell weigh?: A men's Olympic barbell is 45 lb (20 kg). Women's Olympic bars are 35 lb (15 kg), and many training or technique bars are 15 lb (10 kg). Pick your bar in the calculator so the plate math is correct.
Why can't I make some exact weights?: Plates come in fixed denominations, so some totals aren't loadable. The smallest standard jump is 2.5 lb per side (5 lb total) or 1.25 kg per side (2.5 kg total). If a target falls between those, the calculator shows the closest loadable weight and the leftover.
What plates should a home gym have?: A practical lb set is pairs of 45, 25, 10, 5 and 2.5; in kg, pairs of 20, 15, 10, 5, 2.5 and 1.25. The smaller plates and micro/fractional plates let you make small progressions.
Does the calculator count both sides?: Yes. The per-side list is what you load on one end; the loadable total already includes the bar plus the matching plates on both sides.

Related calculators

Disclaimer. This calculator assumes a standard plate set; check your gym's available plates, as denominations and bar weights vary. Not medical advice.