Use this template for your business
How it works
Tile installation is priced per square foot, but not all square feet are equal. A straight lay and a herringbone take different amounts of time and produce different amounts of waste; a diagonal lay adds both. That's why the template asks for the area first and the pattern second, and the difficulty multiplier goes into the calculation from the start instead of showing up on the job site.
The second question that's about money is surface prep. Leveling walls and floors often costs about as much as the installation itself, and the client usually doesn't have it in mind. For the pattern, keep a “not sure” option: the person may not know the names but can pick a picture, and if they didn't pick one, that's a reason for a consultation.
Cuts for outlets, pipes and corners go in a separate question with a quantity. It's a small detail in money and a noticeable one in time, and when it arrives in the lead, the installer plans the day better. The estimate is preliminary, though: the exact scope comes from an on-site measurement, and you should say exactly that in the result.