The first step in lifting a barbell is loading weight plates onto the bar. At some gyms, theres only one type of bar, and it weighs 45 pounds, and thats all you need to know. But thats not the only type out there, and if your gym has different bars of different shapes and weights, its possible to get confused. Check end of the bar firstIf youre wondering about what kind of bar you're looking at or what it weighs, always check the end of it. Sometimes youll find a label with a brand name, a description of what the bar is, and its weight. For example, this one has a little endcap that says The Rogue Ohio Deadlift Bar. 27mm. 20kg. Now you know that it weighs 44 pounds (20kg) and that its got a 27mm wide handle, just over an inch, which is slightly thinner than a typical power bar. Great! Problem solved.But on many bars, all youll see at the end is a rusty bolt. If the bar is seven feet long, it probably weighs 44 or 45 pounds. If youre suspicious, though, trust no one. Ive heard bystanders say oh yeah, that ones 55 pounds for both a standard 45-pound bar, and a monster of a 69-pound trap bar.Theres a simple way to find out how much any bar weighs: weigh it. Almost every gym has a bathroom scale kicking around somewhere, so you can weigh yourself holding the barbell, and then weigh yourself without it and subtract your own weight. (Ask the front desk staff for help if carrying it around to weigh it would be awkward. They may either know the weight, or may be able to help you wrangle it onto a scale.That said, these are the most common bars youre likely to encounter:Standard 44- and 45-pound barsThese are a family of slightly different things, but Im lumping them together because they are about the same size and weight, and can be used interchangeably for many lifts. Some are 44 pounds (because that's 20 kilograms, and 20-kilogram bars are standard in international competition), and some are 45 pounds (which are basically the same thing, but more American). Honestly: dont worry about the difference. A 20 kilo bar loaded with two 45-pound plates is technically 134 pounds, but everybody in the gym will say it's 135 and you might as well go along with it.These 45(ish) pound bars are the most common ones you'll see in the gym. They are seven feet long, with the part you hold about an inch in diameter and the parts where the weight plates go about two inches in diameter. They are sometimes called an "Olympic" bar to distinguish them from the "standard" bars that used to be common, and which you can still buy as home gym equipment. (Ironically, "standard" bars with their one-inch sleeves are no longer standard. But the name has stuck.) Within this category, there are a few different types of 44- and 45-pound bars: Mens Olympic bars are 20kg (about 44 pounds) for the mens bar, and 7.2 feet long. The collars (the wider parts on the ends) spin easily. If you load them up with plenty of weight, you will see that they are whippy, meaning the bar tends to flex or bounce easily. These are designed with the two Olympic lifts in mind, the snatch and the clean and jerk. But you can use them for any lift you like, so youll find them at gyms where nobody does any Olympic lifts. Cap Barbell THE BEAST Olympic Bar | For Weightlifting and Power Lifting, THE BEAST - Black/Chrome, No Center Knurl, 7' Olympic, (OBIS-86B) New Version $131.07 at Amazon $149.99 Save $18.92 Shop Now Shop Now $131.07 at Amazon $149.99 Save $18.92 Power bars, used for squat, bench, deadlift, and the like, are the same size and shape as mens Olympic bars. They tend to be stiffer (less whippy) and the collars will probably not spin as easily. If theyre not 44 pounds, theyll be 45. Deadlift bars may be a bit longer than a typical power bar, and may be thinner and more whippy. They are usually still 45 pounds. Squat bars are a wild card here. Normally, the bar in a squat rack will be a regular power bar. But sometimes, it will be a specialized squat bar that is thicker and stiffer, and that may weigh 50 pounds, or sometimes 55 or more.Womens Olympic barsWomens bars are lighter and slightly thinner than mens Olympic bars, but they are also noticeably shorterabout eight inches shorter. They weigh 15kg, or 33 pounds. METIS Womens 33LBS Olympic Barbell [6.6FT] - Complies with IWF Standards | Ideal for Beginners & Female Lifters $159.99 at Amazon Shop Now Shop Now $159.99 at Amazon Womens Olympic bars exist for women to use when competing in the snatch and clean and jerk. They have two main advantages over a mens bar (if you are an average sized woman): They are thinner, making them easier to grip, especially with the hook grip that Oly lifters typically use. They are whippier, so that the bar doesnt require quite as much weight on it for it to be able to flex and bounce. This matters in Olympic lifting (for example, when you use the bounce to help you as youre standing up from a clean) and means basically nothing for other lifts.Because theyre specialized for Olympic lifting, youre only likely to see these bars in Olympic weightlifting gyms and in Crossfit gyms (and similar functional fitness spaces). You're not too likely to see these bars in your average commercial gym. Training bars and curl barsThese bars are lighter and may be smaller than the ones discussed above. In Olympic weightlifting, there are training bars (often 5kg or 10kg, so 11 or 22 pounds) that exist to give you something lighter to work with if youre not ready for a full size bar. They may be the same dimensions as a women's Olympic bar, and are used by kids learning the lifts. Again, you're not likely to see these outside of an Olympic weightlifting gym, but you never know. They'll be clearly marked on the endcap, and usually shouldn't be loaded past about 50 pounds total. Curl bars are much more common in general-purpose gyms, and are just what they sound like: shorter, smaller bars meant for doing bicep curls and other moves that dont require a full size bar. At my gym, theyre not kept with the regular bars, but instead stored near the dumbbell racks. Curl bars are often, but not always, 25 pounds. Check for a label or weigh them to be sure.EZ-curl barsThese are the wiggly ones. Theyre used like curl bars, for exercises that use smallish amounts of weight. Their handles are designed so that you can choose the position thats most comfortable for your wrists. They may be 25 pounds or less; this one is 15 pounds. Elevens EZ Bar Curl Barbell 4ft-22LB 330LBS Capacity Olympic Bearing Barbell (330LB-Sliver), 47 inches (A-YD04001) $42.99 at Amazon $59.99 Save $17.00 Shop Now Shop Now $42.99 at Amazon $59.99 Save $17.00 Trap bars and other oddly shaped thingsThere are a variety of other bars out there, in odd shapes and varying weights. One is the trap bar or hex bar, a hexagon big enough that you stand inside of it. (Its mainly used for trap bar deadlifts, where your hands are at your sides and you dont have to worry about whether youre going to smack the bar into your shins.) Some trap bars are 45 pounds, but some are more and some are less. CAP Barbell Olympic Trap Bar, Hex Bar, Shrug Bar, Deadlift Bar, Black $58.00 at Amazon $89.99 Save $31.99 Shop Now Shop Now $58.00 at Amazon $89.99 Save $31.99 There are also football bars, also called Swiss bars or multi-grip bars, that allow you to use a neutral grip for bench press or other pressing movements. Sometimes theyre 45 pounds, but again, sometimes they arent. You may also find safety squat bars, cambered bars, and other specialty items depending on your gym. Unusual bars arent standardized, so the weight is just whatever it ended up being when the bars maker welded all the parts together. And when in doubt, weigh it yourself.