Walk up to the curl station, grab the wavy bar, and there is a good chance you have no idea what it actually weighs. That is a problem, because if you are tracking your lifts, the bar is part of the load. Guess wrong and your logbook is wrong.
Here is the short answer: an EZ curl bar weighs roughly 7 kg (15 lb) on average, with most bars falling somewhere between 5 kg and 10 kg (10 to 25 lb). It is almost never 20 kg (45 lb) like a full Olympic barbell. If you have been assuming the curl bar matches your big bar, you have been overstating every set.
Let me break down why the weight varies, how to nail down your specific bar, and why it matters.
What Is an EZ Curl Bar?
The EZ curl bar is the short, W-shaped or zig-zag bar you see racked near the dumbbells. That bend is not decoration. The angled grips rotate your wrists into a semi-supinated position, which takes strain off the wrist and elbow joints compared to a dead-straight barbell.
That is why it shows up on two movements more than any other: barbell curls and lying triceps extensions (skullcrushers). A straight bar forces full supination, which many lifters feel in the wrists and elbows over time. The EZ bar lets you load those same muscles with less joint stress, so you can train harder and longer.
It is a specialty tool, not a main barbell. It is shorter, lighter, and built for isolation work.
How Much Does an EZ Curl Bar Weigh?
There is no single answer, because there is no single standard. Unlike an Olympic barbell, which the IWF pins at exactly 20 kg for men, EZ bars are made by dozens of manufacturers to no shared spec. Weight depends on length, steel thickness, and sleeve type.
That said, here is the realistic breakdown you can plan around.
| Bar type | Typical weight | Plate size | Notes |
|---|---|---|---|
| Standard EZ bar (1-inch) | 5-7 kg (10-15 lb) | 1-inch hole | Lighter, fixed sleeves, home-gym common |
| Olympic EZ bar (2-inch sleeve) | 8-10 kg (18-25 lb) | 2-inch Olympic | Heavier, rotating sleeves, commercial gyms |
| Pre-loaded fixed EZ bar | Marked total | None | Weight is stamped on the bar |
| Average across all types | ~7 kg (15 lb) | Varies | Use as a rough default only |
The two categories that matter most are standard and Olympic, and the difference comes down to the sleeves.
Standard EZ Bars (1-Inch)
Standard bars have thin, 1-inch sleeves that take 1-inch plates. They are lighter, usually 5 to 7 kg (10 to 15 lb), and the sleeves are often fixed, meaning they do not spin. You will find these in home gyms and budget setups. They are cheaper and perfectly fine for curls, but the fixed sleeves can feel less smooth on fast reps.
Olympic EZ Bars (2-Inch Sleeve)
Olympic EZ bars have the fatter 2-inch sleeves that accept the same Olympic plates your big barbell uses. The extra steel and the rotating sleeve hardware push these to 8 to 10 kg (18 to 25 lb). These are the standard in commercial gyms because they share a plate system with the rest of the floor. If you are curling in a chain gym, you are almost certainly using one of these.
For a fuller comparison of how these two systems differ across every bar in the gym, see our guide on Olympic vs standard bars.
Why You Should Never Assume It Is 45 lb
This is the single most common mistake with the curl bar. Lifters see a barbell shape and default to 20 kg (45 lb), the weight of a standard Olympic barbell. The EZ bar is never 45 lb. It is shorter and uses far less steel, so it cannot be.
If you log a 30 kg curl assuming a 20 kg bar plus 10 kg of plates, but the bar is actually 7 kg, your real load is 17 kg. That is a 13 kg error on a single exercise, and it compounds across every session. Your progression data becomes fiction.
The same logic applies to the big bar, by the way. If you are fuzzy on standard bar weights, our breakdown of how much a barbell weighs covers the full range from training bars to competition bars.
How to Find Your Exact EZ Bar Weight
Do not guess. There are three reliable ways to get the real number, in order of preference.
- Check the manufacturer. Most bars have a brand and model. A quick search of the spec sheet gives you an exact figure. This is the most accurate method.
- Weigh it yourself. Step on a bathroom scale holding the bare bar, then subtract your bodyweight. Do it twice to confirm. Takes thirty seconds and settles the question forever.
- Estimate by type. If you cannot do either, use the table above: assume 6 kg (13 lb) for a standard bar or 9 kg (20 lb) for an Olympic bar. Treat it as a placeholder until you can verify.
Once you know the bar, add it to every set. When you plan your plate loading, our free barbell plate calculator lets you set a custom bar weight so your totals are correct from the first rep, whether you are on the EZ bar, the straight bar, or anything else.
The bar is not free weight you get to ignore. It is the first plate on every lift, and on a curl bar it can be a third of your total load.
EZ Bar vs Straight Bar: Which Should You Use?
For curls and skullcrushers, the EZ bar wins for most people because of the wrist angle. If your wrists or elbows nag you on straight-bar work, switch. You will not lose meaningful muscle activation, and you will train the movement more comfortably.
The straight bar has its place for lifters who want maximum supination and full biceps peak contraction, and who have no joint issues with it. Many strong lifters simply rotate between both to hit slightly different angles. There is no wrong choice here, only the one your joints tolerate best over years of training.
Just remember the two bars weigh different amounts. Do not carry a curl-bar number over to a straight-bar log, or vice versa.
FAQ
How much does an EZ curl bar weigh in kg?
Most EZ curl bars weigh between 5 kg and 10 kg, with 7 kg (15 lb) being a solid average. Standard 1-inch bars sit at the lighter end, around 5 to 7 kg, while heavier Olympic-sleeve bars run 8 to 10 kg. Always verify your specific bar rather than trusting the average.
Is an EZ bar 20 lb or 45 lb?
Neither is a safe default. EZ bars are usually 10 to 25 lb (roughly 5 to 10 kg). They are never 45 lb, because that is the weight of a full-length Olympic barbell, which is far longer and heavier. Twenty pounds is a reasonable guess for a mid-range Olympic EZ bar, but weigh yours to be sure.
Does the EZ bar weight count in my total?
Yes, always. The bar is the base of every rep, so your true load is the bar plus all the plates. On a curl bar the bar can be 20 to 30 percent of the total, so leaving it out badly understates your working weight and corrupts your progress tracking.
Why do EZ curl bars weigh different amounts?
Because there is no universal standard. Manufacturers vary the length, the thickness of the steel, and the sleeve type. A short, thin standard bar with fixed 1-inch sleeves weighs far less than a beefy Olympic bar with rotating 2-inch sleeves. That is the whole range in one sentence, and it is why you check the specific bar in front of you.