Ceramic tile estimating usually comes into play in the middle of a renovation because you probably don’t know exactly the tile you want before the renovation begins. The renovator will provide you an allowance to give you some idea what you’ll end up spending.
That number will range between 12 and 30 dollars per square foot for the supply and install depending on where the tile is going (floor or wall) and how fussy or high end the renovator thinks you are. I know a range this wide doesn’t help you much when you are making a serious tile decision, but truthfully, I’m reluctant to give a narrower range because tile is such an individual taste.
Here what matters more about tile: make your renovator use the best installer in the country. With tile, great work will make you a lot happier with whatever you spend.