Benjamin Moore Paint Calculator
Estimate how much Benjamin Moore paint you'll need for your next project with our easy-to-use calculator. Getting the right amount of paint is crucial for a smooth project, preventing multiple trips to the store or unnecessary waste. This tool helps you factor in room dimensions, openings, and the number of coats for an accurate estimate.
function calculatePaint() {
var roomLength = parseFloat(document.getElementById('roomLength').value);
var roomWidth = parseFloat(document.getElementById('roomWidth').value);
var roomHeight = parseFloat(document.getElementById('roomHeight').value);
var numDoors = parseFloat(document.getElementById('numDoors').value);
var numWindows = parseFloat(document.getElementById('numWindows').value);
var numCoats = parseFloat(document.getElementById('numCoats').value);
// Standard values for Benjamin Moore paint coverage and opening sizes
var paintCoverageSqFtPerGallon = 400; // Typical coverage for Benjamin Moore premium paints
var standardDoorAreaSqFt = 21; // Approx. 3 ft x 7 ft
var standardWindowAreaSqFt = 15; // Approx. 3 ft x 5 ft
if (isNaN(roomLength) || isNaN(roomWidth) || isNaN(roomHeight) || isNaN(numDoors) || isNaN(numWindows) || isNaN(numCoats) ||
roomLength < 0 || roomWidth < 0 || roomHeight < 0 || numDoors < 0 || numWindows < 0 || numCoats < 1) {
document.getElementById('paintResult').innerHTML = 'Please enter valid positive numbers for all fields. Number of coats must be at least 1.';
return;
}
// Calculate total wall area
var wallArea = 2 * (roomLength + roomWidth) * roomHeight;
// Calculate area of doors and windows to subtract
var openingsArea = (numDoors * standardDoorAreaSqFt) + (numWindows * standardWindowAreaSqFt);
// Calculate paintable area
var paintableArea = wallArea – openingsArea;
// Ensure paintable area is not negative
if (paintableArea < 0) {
paintableArea = 0; // Can happen if many large openings in a small room
}
// Calculate total paint needed in gallons
var totalPaintNeededGallons = (paintableArea * numCoats) / paintCoverageSqFtPerGallon;
// Round up to the nearest half gallon or full gallon for practical purchasing
var roundedPaintNeededGallons = Math.ceil(totalPaintNeededGallons * 2) / 2; // Rounds to nearest 0.5 gallon
document.getElementById('paintResult').innerHTML =
'
Estimated Paint Needed: ' + roundedPaintNeededGallons.toFixed(1) + ' gallons' +
'This estimate assumes a typical Benjamin Moore paint coverage of ' + paintCoverageSqFtPerGallon + ' sq ft per gallon and standard door/window sizes. Always consider purchasing a little extra for touch-ups.';
}
.benjamin-moore-calculator-container {
font-family: 'Arial', sans-serif;
max-width: 600px;
margin: 20px auto;
padding: 25px;
border: 1px solid #e0e0e0;
border-radius: 8px;
background-color: #f9f9f9;
box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
.benjamin-moore-calculator-container h2 {
color: #1a2e4a; /* Benjamin Moore blue */
text-align: center;
margin-bottom: 20px;
font-size: 26px;
}
.benjamin-moore-calculator-container p {
color: #555;
line-height: 1.6;
margin-bottom: 15px;
}
.calculator-form label {
display: block;
margin-bottom: 8px;
font-weight: bold;
color: #333;
font-size: 15px;
}
.calculator-form input[type="number"] {
width: calc(100% – 22px);
padding: 10px;
margin-bottom: 15px;
border: 1px solid #ccc;
border-radius: 5px;
font-size: 16px;
}
.calculator-form button {
background-color: #4a7c59; /* Benjamin Moore green */
color: white;
padding: 12px 20px;
border: none;
border-radius: 5px;
cursor: pointer;
font-size: 18px;
width: 100%;
transition: background-color 0.3s ease;
margin-top: 10px;
}
.calculator-form button:hover {
background-color: #3a6a49;
}
.calculator-result {
margin-top: 25px;
padding: 15px;
border: 1px solid #d4edda;
background-color: #eaf7ed;
border-radius: 5px;
font-size: 18px;
color: #155724;
text-align: center;
}
.calculator-result p {
margin: 5px 0;
}
.calculator-result .note {
font-size: 14px;
color: #666;
margin-top: 10px;
}
.calculator-result .error {
color: #721c24;
background-color: #f8d7da;
border-color: #f5c6cb;
padding: 10px;
border-radius: 5px;
}
Understanding Your Paint Needs
Painting a room can dramatically transform its look and feel. Benjamin Moore paints are renowned for their quality, rich colors, and excellent coverage. However, knowing how much paint to buy is often a challenge. Our calculator simplifies this by taking into account several key factors:
- Room Dimensions: The length, width, and height of your room directly determine the total square footage of wall space.
- Doors and Windows: These openings reduce the area that needs to be painted. Our calculator uses standard estimates for door (21 sq ft) and window (15 sq ft) sizes to subtract from the total.
- Number of Coats: Most painting projects require two coats for optimal color depth, durability, and even coverage, especially when changing colors significantly. If you're just doing a refresh with a similar color, one coat might suffice, but two is generally recommended.
- Paint Coverage Rate: Benjamin Moore paints typically offer excellent coverage, often around 400 square feet per gallon. This can vary slightly based on the specific product line (e.g., Aura, Regal Select, Ben), surface porosity, and application method.
Tips for a Successful Benjamin Moore Paint Project:
- Prepare Your Surfaces: Clean, dry, and smooth surfaces are essential for the best paint adhesion and finish. Fill holes, sand rough spots, and prime if necessary.
- Choose the Right Finish: Benjamin Moore offers various finishes (flat, matte, eggshell, satin, semi-gloss, high-gloss), each suited for different areas and desired aesthetics.
- Buy a Little Extra: It's always a good idea to purchase a small amount more than the calculator suggests (e.g., an extra quart or half-gallon) for touch-ups down the line. Paint colors can be difficult to match perfectly if you need more later.
- Test Your Color: Before committing, try a sample pot of your chosen Benjamin Moore color on a small section of your wall to see how it looks in different lighting conditions throughout the day.
- Proper Ventilation: Ensure good airflow in your painting area, especially when using oil-based paints.
By using this calculator and following these tips, you'll be well on your way to achieving a beautiful, professional-looking finish with your Benjamin Moore paint.
Example Calculation:
Let's say you have a room that is 12 feet long, 10 feet wide, and 8 feet high. It has 1 door and 2 windows, and you plan to apply 2 coats of paint.
- Wall Area: 2 * (12 ft + 10 ft) * 8 ft = 2 * 22 ft * 8 ft = 352 sq ft
- Door Area: 1 door * 21 sq ft/door = 21 sq ft
- Window Area: 2 windows * 15 sq ft/window = 30 sq ft
- Total Openings Area: 21 sq ft + 30 sq ft = 51 sq ft
- Paintable Area: 352 sq ft – 51 sq ft = 301 sq ft
- Total Area for 2 Coats: 301 sq ft * 2 coats = 602 sq ft
- Paint Needed (Gallons): 602 sq ft / 400 sq ft/gallon = 1.505 gallons
- Rounded Up: You would likely need to purchase 1.5 gallons of Benjamin Moore paint.