How to Load a Barbell: Plate Combinations for Every Target Weight

Loading a barbell correctly takes about ten seconds once you know the math — but the mental arithmetic can trip you up mid-session when you’re fatigued, especially when mixing plate sizes. This guide gives you the exact plate combinations for every common training weight in both pounds and kilograms, so you can stop doing head-math and start lifting.

How Barbell Loading Works

The formula is: (target weight − bar weight) ÷ 2 = weight per side.

Example: You want to squat 315 lbs with a 45-lb bar. (315 − 45) ÷ 2 = 135 lbs per side. Load 3 × 45-lb plates on each side. Done.

The bar weight is always part of the total. Most gyms use 45-lb (20 kg) Olympic bars. If you’re using a specialty bar — safety squat bar (60–70 lbs), squat bar (55 lbs), or women’s Olympic bar (33 lbs) — adjust accordingly.

Barbell Loading Reference: Imperial (lbs)

Standard 45-lb Olympic bar. Plates available: 45, 35, 25, 10, 5, 2.5 lbs.

Barbell Loading Reference: Metric (kg)

Standard 20 kg Olympic bar. Plates available: 25, 20, 15, 10, 5, 2.5, 1.25 kg.

Loading Order Matters

Always load the largest plates closest to the bar’s sleeve collars, working outward to smaller plates. Loading a 10 lb plate on first, then trying to slide a 45 lb plate over it, is physically difficult and risks dropping the heavy plate. Largest goes on first, smallest on last — every time.

Load both sides alternately rather than loading one complete side first. An unloaded bar with full plates on one side can tip off a rack or sawhorse. Adding weight in turns keeps the bar balanced throughout loading.

Always Secure Collars

Spring collars — the simple clip-on type found in most commercial gyms — are quick and adequate for most training. Competition collars are heavier (2.5 kg / 5.5 lbs each) and lock more securely. If using competition collars, factor their weight into your total: two 2.5-kg collars add 5 kg (11 lbs) to the bar. For most gym sessions, spring clips are light enough to ignore in the calculation.

Never skip collars on dynamic movements — cleans, snatches, push presses — or on any loaded bar that leaves your hands at any point. Plates shifting mid-lift can cause the bar to tip and the plates to slide off, which is both dangerous and hard to explain.

Common Loading Mistakes

Forgetting the bar weight: The most common math error. If you want 225 lbs and load 225 lbs in plates, you’re actually lifting 270 lbs. Always start from the bar weight and add plates from there.

Using the wrong bar: A safety squat bar or specialty bar in a shared gym can look similar to a standard bar from across the room. If you’re unsure, check the end of the sleeve — many specialty bars are labeled. If not, weigh it on the gym scale or ask.

Mixing metric and imperial plates: Some gyms stock both. A plate labeled 20 (kg) and a plate labeled 45 (lbs) look similar but differ by about half a pound. In practical terms this rarely matters for regular training but becomes important for tracking PRs accurately.