An example of the wall measurement would be: 40 linear feet of bedroom space, x 8 wall height, =  320, x 2 = 640. Minus 1 door (60) and 2 windows (80) = 500 sq feet being painted. Then divide the 500 by 400 (sq feet per gallon), and you get 1.25 gallons (4.73 L) needed for that room. For this, you'd need 1 gallon (3.8 L) and 1 US-quart (950 ml). If the amount it comes out to is over 1.3, we recommend just getting 2 gallons (7.6 L) so that you have leftovers if needed, since 2 US quarts (2,000 ml) costs essentially the same as a gallon in most stores.
Paint can be expensive. Buying too much paint is particularly frustrating since paint stores won’t refund an already tinted gallon of paint. That’s why it’s recommended to first buy around 80% of the estimated paint you need and then purchase the remainder when you’re almost finished. Factors such as square footage, surface type, and quality of paint all play into how much paint you’ll need. Paint stores should be able to help you determine how much paint you need for a specific job. If you aren’t sure how much paint to buy, ask a salesperson for advice.
Specialty painting, like murals and trompe l’oeil, costs $40 to $50 per hour. Paint might range between $75 to $90. The professional’s skill and experience are also determining factors. While a freelance artist might charge $25 to $30 an hour, a very skilled professional might charge $80 or more. Some might also charge $60 or more for a consultation.

When painting a carpeted room, keep in mind that paint will soak through drop cloths. This is especially true of the cheaper, lightweight cloths. It helps to tape masking paper to all of the base boards before laying the drop cloths. Tuck the edges of the cloth under the paper--this will help keep it clean. You might want to invest in a hand-held masking machine--they make the job go much faster. Even after taking these precautions make sure to clean big drops or spills before they soak through and before you step on them!

Carefully consider the gloss level. The shiny gloss paints are easy to clean, but will make any wall blemish stand out. The flat paints will help disguise wall blemishes, but can be difficult to clean. Generally, you'll want glossier paints where there's lots of steam or cooking (baths and kitchens) and in high-traffic areas. Flatter paints are preferred for large walls and ceilings.
At least 90% of painting time goes into setup, prep work, and priming. The method of prepping required varies for each type of exterior material on the home, but every project must be patched and cleaned. The more thoroughly you prep and prime your home’s exterior, the longer your paint job will last. You could save quite a bit if you do this part yourself, but it must be done correctly, or your contractor will have to go over what you missed. The prices mentioned are based on paying a contractor to do each job rather than one overall quote for the work from start to finish.
One of the most common home-improvement projects can also be one of the most enjoyable for the entire household. While some aspects of interior room painting, such as masking and “cutting in,” can require some experience and skill, applying a fresh coat of paint to a ceiling or wall or doorway is often a matter of a good brush, a paint tray, and some sweat equity. A coat of fresh paint may be all that’s required to revive a living space that’s faded a bit.
I had Renato pain both interior and exterior (ongoing as I type). So far these projects have gone about as well as we could've hoped. Renato is great he is very good at staying on top of things and his crews are polite, work quickly and keep things cleaned up on a daily basis. I would highly recommend General Painting to anyone, including family and friends (which we've already done by the way). Thanks Renato.
However, some water-based paints are easier to work with than others. The first coat of paint may not provide complete wall coverage, or the color may not be quite as saturated. Some of these problems can be addressed with a separate primer coat, but this is a time-consuming project. The ideal solution is using a higher-quality paint that combines a primer and a finish paint in a “one coat” product.
On average, expect to pay $0.60–$1.60 per square foot for exterior painting. The average for painting labor across the country is $30–$40 per hour before you pay for paint, painting supplies, location costs, and equipment. To get a very general estimate, though, painting contractors will take into account the square footage of your home and the number of stories and also factor in normal prep work.
A single gallon of paint can run anywhere from $20 to $80 per gallon. Professionals get a contractor discount of anywhere from 25 to 50 percent. For rough siding, like stucco, you’ll need to use 10% to 20% more paint. Some textures, like wood and stucco, require extra paint because they have more surface to cover in a tiny area compared to smooth siding. Use the highest quality exterior paint your budget will allow for your project. It will look the nicest and save you money by offering better coverage and durability. Better coverage means fewer coats and fewer work hours. You’ll also go a few years longer without needing to shell out more cash for a new coat. How do you know how much paint you're paying for? Here's some helpful math: