One 54" yard of fabric is equal to 18 square feet of leather. Here is a link to Garrett Leather's estimates for upholstery.
Take a look at the average cutting area of a hide.
A common term for dyed leather is Aniline dyed - the process that results in true color permanence. Transparent dyes penetrate the cell layers throughout the thickness of the hide, producing deep, vibrant, and durable colors. It conceals none of the natural characteristics or markings.
Beautiful leather can be found on www.InteriorDecorating.com