How to Estimate How Much Paint You Need

By Mack.Painters | Painting

Aug 28
How to Estimate How Much Paint You Will Need to Paint Your House - Interior Home Painting


If you’re painting your home’s interior on your own, especially if it’s your first time through this, you need a solid way to figure out how much paint you’ll need.

Here’s what you need to know.

How to Estimate How Much Paint You Need

There’s a mathematical formula you can use to figure out how much paint you need – and it’ll work whether you’re painting a small bathroom, a big kitchen, or the entire house.

As a general rule, you can get about 400 square feet of painted surface from one gallon of paint. However, some paints provide more – and some provide less. It’s better to have more than you need than less than you need, so round up!

Pro Tip: Even if a can of paint says you only need one coat to completely cover another color, be leery – that’s a bold claim to make, and we haven’t found any that can actually live up to that promise.

The way to figure out how much paint you need is to add up the square feet you need painted, then divide it by 400. The resulting number is the number of gallons you need to buy… but don’t forget to round up.

If you have to paint 2,500 square feet, this is what your math will look like:

How to figure out how much paint you need for your house - Mack Painters

Pro Tip: If you know you’ll need 5 gallons, buy a 5-gallon bucket of paint – don’t buy five 1-gallon cans.

Other Things to Know Before You Paint

  • Semi-gloss paints usually require more coats than flat paints do.
  • If you buy 3 gallons of paint, mix them all together before you start painting – that way you can be sure the color is perfectly matched.
  • Standard doors are 21 square feet.

Do You Need Painting Help?

We can handle all your interior painting for you – just call us at 910-725-3227. We’ll be happy to give you a free painting estimate for any of our services. AberdeenPinehurstSouthern Pines and Myrtle Beach painting pros are right here waiting to help.


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