Many people need to know how to cut 2x4's with a circular saw and don't know how. I've cut many 2x4's in my day, so I want to show you how to use a circular saw to cut a 2x4. It is really easy, so don\u2019t worry!\n\n\n\nHow to cut a 2x4 with a circular saw:\n\n\n\nMark your cutline on the 2x4.Unplug your circular saw.Set the blade angle and depth properly. Properly support the 2x4 to not bind the blade. Take proper safety precautions. Plug the saw back in.Pull the trigger, follow your cutline, and don't go too fast. \n\n\n\nThere\u2019s a few different ways to accomplish these steps, so let\u2019s dive into some detail about actually using your circular saw.\n\n\n\nWhat Type of Cut on a 2x4 with a Circular Saw\n\n\n\nThe first step to cutting a 2x4 with your circular saw is knowing what type of cut that you want to make. You can cross cut, miter cut, rip cut, bevel cut, compound miter cut, plunge cut, dado cut, and groove cut your 2x4.\n\n\n\nIf this seems overwhelming, don\u2019t worry because it\u2019s not. It\u2019s actually really simple, and I\u2019ll walk you through each type of cut below.\n\n\n\nAlso, don\u2019t worry too much about what blade to use. Most will cut a 2x4 just fine. Some blades just give either a smoother or a rougher cut.\n\n\n\nSupporting Your 2x4 For Cutting With a Circular Saw\n\n\n\nBefore getting into cutting, I just want to give you a few safety tips. Supporting your 2x4 properly before you make your cut is very important. This will help you make a good cut and keep you safe.\n\n\n\nIf your working on a table and you just need to cut off a little bit from your 2x4, then dangle the short side of your 2x4 off of the side of the table. \n\n\n\nIf you need to cut your 2x4 in half, make sure your 2x4 is clamped down to your table, because it\u2019ll want to move when you make your cut.\n\n\n\nIf you\u2019re wondering how to use a circular saw without a table, then you have a few options. Sawhorses are usually a good option if you are on the go. You can set them up really quickly and they\u2019re really sturdy. \n\n\n\nMake sure to put them both on the long side of the 2x4 when you cut. If you put a sawhorse on each side of your cutline, bad things will happen. When you finish your cut, not only will your wood bind your saw blade and kickback, each side of your 2x4\u2019s will collapse down in the middle and you might end up cutting yourself, and that would suck.\n\n\n\nIf you don\u2019t have access to a table or sawhorses, you\u2019re still in luck. Mother earth is always available! You can either use something stable to prop up the long side of the 2x4 with, or you can use your foot! This isn\u2019t recommended, but sometimes you\u2019ve got to do what you\u2019ve got to do.\n\n\n\nHow to Cross Cut a 2x4 with a Circular Saw\n\n\n\nThe most common type up cut with a circular saw is probably the cross cut. A cross cut is simply cutting across the grain of the 2x4. Let\u2019s say that you need a 2x4 that is 60 inches long. This would be a cross cut. Take one end of your tape measure and put it on the end of your 2x4. Pull your tape measure along the wood until you are a little past 60 inches and make 2 marks on the wood.\n\n\n\nNow, take something with a straight edge and draw a line across your 2 marks so you have a complete cutline. I like to use either a combination square or a rafter square for this. As the old saying goes, measure twice and cut once! This will help you to avoid wasting your lumber. Wood is expensive and no one likes wasting money.\n\n\n\nSo you have your 2x4 with your cutline drawn and now it\u2019s time to cut, right? Wrong. Before cutting the 2x4, you need to make sure that your circular saw is set up correctly.\n\n\n\nYou basically want to make sure that your circular saw is cutting at the right angle and the blade is going all the way through the wood. Unplug your saw and adjust your saw\u2019s bevel and depth settings by loosening the levers or knobs. Make the change, and tighten everything back down.\n\n\n\nThis may vary depending on your project and your circular saws manufacturers, so make sure to have a good plan for your project and keep your manual.\n\n\n\nIn general, a good rule of thumb is that you want to make sure that the blade depth is going through your 2x4 by about a quarter of an inch. Having it go too far through could result in you cutting something that you don\u2019t want to.\n\n\n\nNow that you know where to cut and your 2x4 is properly supported, plug your circular saw back in. \n\n\n\nMake one final check to make sure that the wood is going to be the only thing that gets cut. This includes making sure that your electrical cord (If your saw plugs in and doesn\u2019t have a battery) is out of the way, and won\u2019t move into harm's way during the cut. Proper safety precautions are always recommended (Safety glasses, hearing protection, respirator\/dust collector).\n\n\n\nPull the trigger and slowly push the saw through the 2x4. After making a few cross cuts with your circular saw, you won\u2019t think twice about how to cut 2x4\u2019s. It will just be natural.\n\n\n\nHow to Miter Cut a 2x4 with a Circular Saw\n\n\n\nA miter cut is just a fancy way of saying cutting on an angle. If you need to miter cut your 2x4, then the process is pretty simple as well. You just figure out what angle you need to cut, mark your cutline, and cut along the angled line.\n\n\n\nIt might be a little more difficult than cross cutting the 2x4 because the saw might want to drift at the start of the cut. This is normal because your not going straight at the 2x4 with your circular saw. \n\n\n\nHow to Rip Cut a 2x4 with a Circular Saw\n\n\n\nA rip cut is when you cut along the grain, which is kind of tricky with a circular saw. Ripping a 2x4 is the same process as most other cuts with your circular saw but longer. Just draw your cutline and follow it as you cut.\n\n\n\nThe challenge with using a circular saw to rip you 2x4 is that the lumber isn\u2019t too wide, so your saw might wobble and move on an angle. This results in your cut not being perfect. It\u2019s also a little tricky supporting your 2x4 properly.\n\n\n\nUsing a table saw is much easier for ripping 2x4\u2019s and other lumber, but if you don\u2019t own one, don\u2019t worry. There are awesome guides that you can buy like this one to help keep your circular saw straight. If you don\u2019t have access to a table saw, and don\u2019t want to buy a guide, you can build yourself a little table saw with your circular saw. This might make things easier on yourself. I\u2019d definitely build a little table saw if I needed to rip a lot of 2x4\u2019s.\n\n\n\nHow to Bevel Cut a 2x4 with a Circular Saw\n\n\n\nMaking a bevel cut with a circular saw is just like every other cut. The only difference is before you make your cut, you adjust the angle of your base plate. First, unplug your saw. Then loosen your circular saw\u2019s bevel adjustment knob or lever. Each saw manufacturer\u2019s knob or lever is in a different place, but you should be able to find it. Once you have your angle properly set, tighten up the knob or lever that you loosened. Plug your saw back in and mark your 2x4 with your desired cutline. Finally, just pull the trigger and follow your cutline.\n\n\n\nHow to Compound Miter Cut a 2x4 with a Circular Saw\n\n\n\nMaking a compound miter cut sounds way harder than it actually is. It\u2019s just a bevel cut and and angle cut at the same time. Don\u2019t let these fancy words scare you!\n\n\n\nAdjust your saw\u2019s bevel angle and mark your angled cutline on your 2x4. Compound miter cuts are common in crown molding and other more advanced projects.\n\n\n\nAlso, sometimes it can get confusing keeping your angles and cuts in order, so make sure you\u2019re making the proper cuts on the proper pieces at the proper angles.\n\n\n\nHow to Plunge Cut a 2x4 with a Circular Saw\n\n\n\nIf you need to cut a rectangular hole out of your 2x4, then the plunge cut is the way to go. A plunge cut is when you enter the wood from the top, rather than the side. First, mark your cutlines on your 2x4. Then line up your saw above your first cut line with the front of the saw\u2019s base plate resting on the wood. Pull back your blade guard and make sure the blade is hovering over the wood and not touching it.\n\n\n\nPress the trigger and get the saw blade up to speed. Slowly lower the back of the saw down and let the blade sink into the wood. Once your saw is level, move forward along your cutline the same way you would when you rip cut a 2x4. Repeat the process on the other side so you have 2 parallel cutlines. \n\n\n\nAlso, make sure you start out a little forward on your cutline because you have to account for the rear of the blade.\n\n\n\nHow to Dado Cut a 2x4 with a Circular Saw\n\n\n\nA dado is basically just a little groove or notch that\u2019s cut across the grain of the wood. They\u2019re used for a ton of things, but mostly for joints and shelves. To cut a dado into a 2x4, start by drawing your cutlines.\n\n\n\nOptionally, setup guides along both sides to make sure your saw doesn\u2019t travel outside of your cutlines. If you can freehand it, bravo! Now set your desired blade depth and make sure you\u2019re blade isn\u2019t going to cut through your material.\n\n\n\nTake the saw and cut on the inside of your cutlines. Now, make a few more passes and remove the material on the inside of the 2 outer cutlines. You can use a chisel to clean up any remaining material that the blade didn\u2019t get.\n\n\n\nHow to Groove Cut a 2x4 with a Circular Saw\n\n\n\nA groove cut is just like the dado cut from above, but instead of cutting across the grain, the circular saw cuts along the grain.\n\n\n\nThe easiest way is to freehand the cut without the use of guides along the side. Just mark your cut lines and make a bunch of cuts with your circular saw. If your cut needs to be perfect then you\u2019d want to use guides. \n\n\n\nUsing guides is a little trickier because the 2x4 is only 3.5 inches wide, and you have to get creative on how to clamp down your guides. Adding lumber to the sides of the 2x4 that your trying to cut gives you a wider base.\n\n\n\nClamp your guides to the extra lumber on the sides and make your cuts, just like the dado. Using the guides takes more time to set up, but your cutlines on your 2x4 will probably end up more straight.\n\n\n\nCan I Cut Curves With a Circular Saw?\n\n\n\nYes, but make sure your curve is very gradual. If it\u2019s too severe, you won\u2019t be able to turn your saw to make the proper cut. Also,your saw blade could bind and get pinched as well. If your curve is gradual and you end up making the cut, they might be pretty rough. That\u2019s just fun. Just give them a little TLC when you begin sanding.\n\n\n\nI like to make things easier by using either a jigsaw or bandsaw to cut curves. I\u2019m able to cut much tighter curves and have a lot more control with these two other saws versus a circular saw.\n\n\n\nCircular saws can cut many types of wood, from dimensional lumber to big plywood sheets. This is what makes them a very versatile tool that every craftsman should have. Cutting curves is probably the worst aspect of using a circular saw to cut a 2x4.\n\n\n\nWhy You May Not Want to Use a Circular Saw\n\n\n\nUsing a circular saw to cut a 2x4 is totally normal, but there may be reasons why you would want to stay away.\n\n\n\nSome people are intimidated by power tools and are even scared to pick them up. That\u2019s totally fine. Being hurt by rotating saw blades or flying debris isn\u2019t too much fun. I have been victim of this myself and can understand where they\u2019re coming from.\n\n\n\nIf you\u2019re reading this far, I think it\u2019s safe to say that you have or your going to take the plunge (No pun intended, but I find it rather funny), so kudos to you!\n\n\n\nAs I mentioned before, there are tons of different tools that you can use to cut a 2x4. You could use a hand saw, jig saw, table saw, miter saw (AKA Chop box), etc\u2026 I like to use a miter saw\/chop box myself, but it all depends on where I\u2019m working and what tools are close by.\n\n\n\nThe 2x4 Cutting with a Circular Saw Conclusion\n\n\n\nWell, hopefully I explained how to cut a 2x4 with a circular saw good enough for you to start feeling confident.\n\n\n\nAs always, if you have any questions or comments, type away in the section below!