[header] How to cut carpet [title] Start with a sharp knife. [step] This will be the most important (and possibly the only) tool you'll need to cut carpet. A standard utility knife is preferable, though something like an x-acto knife or razor can also do the trick. 
Whatever you use, make sure the edge is nice and sharp. [substeps] If you're using a utility knife with a removable blade, take a minute to insert a new one before you get started.