Startup/Venture Capital lawyer here (but not your lawyer). Agreed with chimeracoder below. As for cost, a few grand is a good minimum estimate, but it really depends on the complexity. If you've been around as an LLC for a while, you may have different types of equity that has been issued (e.g. profits interests), which will complicate the conversion process a bit. Your lawyer will also have to review the LLC's operating agreement to make sure there aren't any funky protective provisions or oddities that will complicate the conversion. Unlike most Delaware C-corp charters in the startup world, LLC operating agreements are extraordinarily flexible and variable documents, so it's a custom review almost every time we have to go through one of these conversions.