If you’re good at basic math and operating a tape measure you should have no trouble estimating the the net square footage of square and rectangular spaces you want to cover; add an industry standard 10% for waste and attic stock of piece material. Complicated layouts and sheet flooring often require the skills of a professional measurer. That is a service I provide - from simple square foot [sf] numbers to computerized floor plans with layout direction and/or seam placement. The cost of this service varies depending on extent.