If you are tracking your lifts and asking how much does the smith machine bar weigh, you have probably wondered whether to add the bar’s weight to your total — and what that weight actually is. Unlike a standard Olympic barbell, which is a reliable 20 kg, Smith machine bars differ from machine to machine. This guide gives you the full picture: typical weights, why they vary, how to find out your machine’s figure, and how to count it in your training log.

The quick answer in detail

Here is the range you can expect:

• Non-counterbalanced Smith machines: the bar usually weighs 15–25 kg (35–55 lb), close to a standard barbell.
• Counterbalanced Smith machines: the actual bar may still weigh 15–25 kg, but counterweights or spring systems offset most of it, so the effective starting resistance is around 7–13 kg (15–30 lb).
• Popular commercial example: Hammer Strength Smith machines are widely quoted as having an effective bar weight of about 9–13 kg (20–30 lb).

The key distinction is between the bar’s actual weight and the resistance you actually feel. For tracking your progress, the effective resistance is the number that matters.

Why Smith machine bar weights vary so much

Several design factors change how heavy the bar feels:

• Counterbalance systems: weights, springs or pulleys connected to the bar carriage offset its weight. This is the biggest single factor — it can halve or more the felt weight.
• Guide rod friction: the bar slides on vertical (or slightly angled) guide rods. Friction adds a small amount of resistance, though on well-maintained commercial machines it is minimal.
• Bar thickness and length: heavier-duty machines use thicker, longer bars, which weigh more.
• Angled vs vertical tracks: some Smith machines angle the track slightly (usually 3–7 degrees), which subtly changes the feel of the movement but not the bar weight itself.

Common Smith machines and their bar weights

These are typical figures — manufacturers update designs, so treat them as a guide rather than gospel. For the definitive number, see the next section.

How to find your machine’s exact bar weight

1. Look for the information plate. Most commercial machines have a sticker or engraved plate on the frame stating the bar weight or starting resistance. Check the uprights and the base.
2. Ask the gym staff. Trainers at UK gyms (PureGym, Nuffield Health, David Lloyd and independents) can usually tell you — they get asked this regularly.
3. Check the manufacturer’s website. Search the model name plus “starting resistance” or “bar weight”.
4. Weigh it yourself. If you have luggage scales and can safely detach or support the bar, you can weigh it — but do not attempt this on a busy gym floor without staff help.

Should you count the bar in your total?

Yes — but count the effective weight, and be consistent. If your machine’s starting resistance is 10 kg and you load 40 kg of plates, log it as 50 kg. What matters most is not perfect accuracy but consistency: always counting the same way lets you see genuine progress over time.

One important note: a 100 kg squat on a Smith machine is not directly comparable to a 100 kg free-weight squat, because the fixed track removes the stabiliser work. That is fine — just compare Smith numbers with Smith numbers. For more on the differences, see our guide on Smith machine vs free weights: which is better for you.

Smith machine vs Olympic barbell weight

For reference:

• Men’s Olympic barbell: 20 kg (44 lb), 2.2 m long
• Women’s Olympic barbell: 15 kg (33 lb), 2.01 m long
• Smith machine bar (effective): typically 7–20 kg depending on counterbalance

So the Smith machine usually starts lighter than a standard Olympic barbell — one reason beginners often find it friendlier. Our full breakdown of how much an Olympic bar weighs covers barbell standards in detail.

Buying a Smith machine for a home gym in the UK

If you are shopping for a home Smith machine, the bar weight and whether it is counterbalanced should be on your checklist, alongside the maximum load rating and footprint. Prices in the UK typically run from around £400–£700 for basic models to £1,500+ for heavy-duty multi-gyms with counterbalanced bars. Retailers like Argos, Mirafit and Powerhouse Fitness stock a wide range, and it is worth reading independent buying advice such as Which? reviews of home gym equipment before spending.

When comparing models, check the product specification for “starting resistance” — that tells you the effective bar weight you will actually lift. Also confirm the machine fits your ceiling height; most need at least 2.1–2.3 m. Our guide on building a home gym on a budget in the UK walks through the full setup.

Tips for training safely and effectively on the Smith machine

Knowing the bar weight is only half the story. These practical tips will help you get the most out of the machine:

• Warm up with just the bar. Because the effective starting resistance is light (often under 13 kg), the empty bar makes an ideal warm-up for your first working sets — much friendlier than a 20 kg Olympic bar.
• Set the safety stops every session. One of the Smith machine’s biggest advantages is the adjustable safety catches. Set them just below your lowest point on squats and bench press so a failed rep is a non-event.
• Keep your foot position consistent. On Smith squats, foot placement changes the emphasis between quads and glutes. Find a stance that feels stable and pain-free, then use the same position each week so your logged numbers stay comparable.
• Control every rep. The guided track can tempt lifters into bouncing or rushing. Lower the bar under control for 2–3 seconds and pause briefly — your muscles, not momentum, should do the work.
• Log the effective weight, not just the plates. Note your machine’s starting resistance once (check the plate or ask staff), add it to every set in your log, and your progression data will be accurate for months.
• Pair it with free weights. The Smith machine is excellent for overload work and training safely alone, but adding some dumbbell or barbell work keeps your stabiliser muscles and balance developing too.

Used this way, the Smith machine is a genuinely useful tool rather than a crutch — and with the bar weight accounted for, your training log will tell the true story of your progress.

Frequently asked questions

Is the Smith machine bar 20 kg like an Olympic bar?

Sometimes the actual bar is close to 20 kg, but because of counterbalancing, the resistance you feel is usually much less — often 7–13 kg. So no, it does not lift like a 20 kg Olympic bar.

Does the Smith machine bar weigh anything at all?

Yes. Even counterbalanced machines have some starting resistance — typically 7–13 kg. Only very specialised machines with full counterbalance approach zero, and those are rare.

How much can you lift on a Smith machine?

Commercial Smith machines typically have maximum load ratings of 180–300 kg including the bar, while home models are often rated 100–180 kg. Always check the rating plate and never exceed it.

Do you include the bar weight when tracking a one-rep max?

For consistency, yes — add the effective starting resistance to the plates. Just remember that Smith machine numbers are not interchangeable with free-weight numbers because the guided track assists stabilisation.

Why does the Smith machine feel lighter than the same weight on a barbell?

Three reasons: the counterbalance offsets bar weight, the fixed track removes stabiliser effort, and many machines have low-friction linear bearings. The plates weigh the same — your muscles simply do less balancing work.

The bottom line: expect an effective Smith machine bar weight of roughly 7–20 kg, check your machine’s plate for the exact figure, and count it consistently in your log. Do that, and the number on the bar becomes one less thing to guess about.