How Do I Convert the Weight of Paint From Gallons to Pounds?

If your teacher gives you a problem about a home-improvement project, you might need to calculate how much space you can paint based on the weight of paint. To convert between the weight and volume of paint, you will need to know its weight per volume, or *density.* Most paints have a density between 9 and 11 pounds per gallon, but finding the exact density for your brand of paint will help you make the most accurate calculations.

Finding a Paint's Density

Different paint formulas have different densities.

Most retailers list the density of their paint in pounds per gallon, so you won't need to worry about units when doing your conversions.  If you have a paint can, it will provide the volume and weight of its contents, so **divide the weight by volume to get the density** If you don't have access to the paint can, you can look up on the Internet the type of paint you are using.

Most paint companies have easily accessible product information sheets that you can access via a search engine or from the product information on the company's website.  These sheets provide **detailed information about the product including the density**.

Converting Gallons to Pounds

**To determine how much a certain volume of paint weighs, multiply that volume by the density** For example, suppose you want to buy 4 gallons of paint with a density of 112 pounds per gallon.  To calculate this, you multiply 4 times 112 **4 gallons x 112 pounds/gallon = 448 pounds** So, this paint would weigh 448 pounds.

Converting Pounds to Gallons

**You can also convert the paint's weight to its volume** To do this, divide the weight by the density.  Suppose you need 75 pounds of paint, and you want to know how many gallons you need to purchase.

If the paint's density is 97 pounds per gallon, to know how many gallons that calculates to, you divide 75 by 97: **75 pounds / 97 pounds/gallon = 773 gallons** So, you need to buy at least 773 gallons of this paint. 

About the Author

Jon Zamboni began writing professionally in 2010. He has previously written for The Spiritual Herald, an urban health care and religious issues newspaper based in New York City, and online music magazine eBurban. Zamboni has a Bachelor of Arts in religious studies from Wesleyan University.

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