Bars and plates
Smith Machine Bar Weight
Updated 1 Nov 2026 · Method: typical bar weights compared across equipment specifications
A Smith machine bar can feel like anything from about 6 to 45 lb, depending on the machine. Enter the starting weight of your bar and the plates on each side to see the total load.
Worked example
- Plates on one side: 70.0 lb
- Both sides: 70.0 × 2 = 140.0 lb
- Add the bar: 140.0 + 20.0 = 160.0 lb
Smith machine bar: what it can feel like
| Bar | Typical weight (lb) | Typical weight (kg) |
|---|---|---|
| Fully counterbalanced bar | about 6 to 10 | about 3 to 5 |
| Partly counterbalanced bar (common) | about 15 to 25 | about 7 to 11 |
| Bar without a counterweight | about 30 to 45 | about 14 to 20 |
| Angled Smith machine (rails tilted) | a little less than the bar weight | n/a |
Ask staff or check the plate on the frame. Many machines list the starting resistance.
Why there is no single answer
On a Smith machine the bar rides on two rails and hooks onto the frame. Many machines hide a counterweight inside the frame that pulls the bar up, so the weight you feel is lower than what the steel bar weighs. That felt number is called the starting resistance.
Machines that are partly counterbalanced, the most common kind, usually feel like about 15 to 25 lb. Fully counterbalanced bars can feel as light as 6 to 10 lb. Bars with no counterweight at all can feel like 30 to 45 lb.
How to find the number for your machine
Start with the frame. Many makers print the starting resistance on a plate or sticker near the rails or on the base. If there is nothing printed, gym staff often know it.
Your next clue is the feel. Unrack the empty bar and compare it with an empty Olympic bar on a press you know. If the Smith bar is clearly easier to move, the machine has a counterweight and you should use the lower ranges in the table.
Angled rails change it a bit
Some machines tilt the rails instead of running them straight up and down. On those, part of the load presses into the rails, so the bar and plates feel a little lighter than their full weight. Friction in the bearings takes off a little more.
The effect is small next to the counterweight question, but it is one more reason a Smith number is only an estimate of the real load.
Logging Smith lifts so they stay useful
Pick one way to count and stick with it. Some lifters record plates only, others add the starting resistance. Either works as long as every entry uses the same rule and the same machine.
Do not compare a Smith squat or press with the free bar version. The rails guide the path, so you do not need to balance the load, and the bar may not weigh 45 lb. To track your free bar strength, use the one rep max calculator with sets done on a regular Olympic barbell.
Where the Smith machine fits
Because you can hook the bar on the frame at any point, the machine lets you stop a set without a spotter. That makes it handy for higher rep work, slow lowering and new lifters learning a pattern.
If you change machines, count your first session as a new starting point. The same plates can feel quite different on another frame.
Related pages
Trap Bar Weight, How Much Does an EZ Bar Weigh, How Much Does a Barbell Weigh, Dumbbell Weight Chart
Questions
Is a Smith machine bar 45 lb?
Rarely as felt. Only a bar with no counterweight comes close to 45 lb. Most counterbalanced machines feel like about 15 to 25 lb.
What does the example on this page add up to?
It uses a 20 lb starting resistance with one 45 and one 25 lb plate on each side. That is 140 lb of plates and 160 lb in total.
Can I weigh a Smith bar on a scale?
Not easily, because the bar is attached to the frame and the counterweight pulls on it. A printed label or the gym staff is the better source.
Why does my Smith bench feel easier than my barbell bench?
The bar may weigh less as felt, and the rails do the balancing for you. Both make the same plates feel lighter than on a free bar.
How we calculate: every formula, with its author and year, is on our method page; data sources and their licenses are on sources.
gymnical.com gives estimates from published formulas and public data. It is not medical advice and not a training prescription. Last reviewed November 2026.