Take for example, I charge 1.75 sq foot for 10x10 room with 8 foot ceilings. By my calculations this would cost $175 with floor space sq foot, but with you method, it would cost $576.00 That is outrageous. Of course I didn't subtract the windows and doors, which is another thing that makes no sense. Cutting in around those windows takes more time, then just rolling a wall.
Whether doing it yourself or hiring someone, buy the best quality paint you can afford; it lasts longer and in some situations requires only one coat of paint instead of two. Painting a room usually involves prep work, primer and latex or alkyd paints with a range of finishes. HGTV.com gives a quick overview  as well as a list of painting dos and don'ts .
restaurant dining area an behind front counter area. Fixed cracks in wall, taped off flooring, several windows (7 large windows,4 small windows) 2 doors, had to cover camera's, ceiling, fans, lights, tables-chairs, had to move plants , paper racks, clocks, etc. things to another room, took all blinds down, dusted everything off from top to bottom then wash walls first, then primer then paint walls an ceiling, used 3 colors of paint for trim an walls, used my own paint sprayer, i also cleaned behind the counter area before i could paint, an when all done I put everything back the way it was oh an also had to work around pushed together tables an chairs, also plastic everything. owner paint for paint an supplies. Me an another person put in a total of 55 hours in in 2 days we had (combined hours) we did excellent work but could use a few numbers to charge without over charging Im a very fair person. Il say the place was the size of about a Mc Donalds behind counter an dining area
People need to realize that if you want a licensed, insured professional painter in your home that is reputable, trustworthy & skilled, that it will cost them an average of $400.00 a day. If you want a nice paint job then it is all about prep work. There is tarping, plastic, furniture moving, caulking, spackling, sanding, priming, sealing, before you even paint. I have repainted interiors that were painted less than a year because the last contractor came in with a cheap price, did zero prep work, & painted with watered down paint. My point, A house is usually the most valuable asset a person will purchase, so why would you let just anyone with a cheap quote work on it? “The bitterness of poor quality remains long after the sweetness of low price is forgotten” – Benjamin Franklin
Although painting a room sounds easy, it can be difficult for inexperienced individuals to coat a room evenly. Too much paint and bubbles start to form, while using too little paint can leave sections pale and off-color. Hiring a professional interior painter near you can eliminate these problems. Plus, a pro can offer color and paint type suggestions, ensure that paint doesn't get on your furniture and floor, and may be able to offer specialty finishes and patterns.
5383 actual square footage of walls. Do not estimate or accept estimates based on square footage of floor. I use a laser device to ACCURATELY measure. I take out for windows and doors. Unless a job is new construction (empty), understand that furniture,artwork, carpet, appliances, etc. will affect time and labor. Also understand that ceiling height is a game changer. A rate of no less than $1.80/sf including materials is realistic, acceptable and more than fair for a qualified professional to paint rooms with 9' ceilings. Expect to pay $1 extra per square foot for 9'- 15' and $2.50 extra for 15' +. Some additional costs for extreme conditions will raise that amount. Trying to base the amount on days worked by number of workers is both unfair to the professional and undue to your senses. This job is based on 15 days work by two workers, one painter and one grunt to tarp, move furniture, clean up and book paint. That nets to approx $663/day. As you can see, not great wages.
"A superb paint job for my family room and kitchen area. It's like I have a new home. I was so sick of the dull colors I had on the walls for several years. What a wonderful experience to see how new my 15 year old home has a wonderful, bright, clean look. Then, the next job was countertops of granite in my out-of-date kitchen. Wow! It is a brand new kitchen - everything I ever wanted. M. Guerrero and his employees did a masterpiece of a job on my new, beautiful countertops. I am extremely happy with the work. These men are absolute experts in their field. I will be calling on them, again, in the future."
I can't say enough great things about Saints of Paint. They went above and beyond my expectations in every possible way. They painted the entire interior of my house and the work that they did was perfect, thorough, and very reasonably priced. Not one detail was missed. On top of that, each member of the team is very friendly, honest, and considerate.
The price to paint an interior versus an exterior depends on a few factors. For painting an exterior, you will pay about $2,600. This is because you have to account for the siding, making sure the weather doesn't affect the job and dealing with weather conditions. On the other hand, the price to paint a home interior is around $1,700 -- less to worry about other than keeping the flooring and furniture paint-free. If you want to do both the interior and exterior, talk to the painters about any deals or their opinion on timeline and how it affects your budget.