Paint Coverage Guide: Use Our Square Footage Calculator for an Approximate Paint Estimate

Estimating paint needs can be tricky in the Sea-to-Sky region, where wall textures, wood features, and climate conditions vary from home to home. A paint calculator is the easiest way to get a quick estimate before you buy materials.

Whether you're refreshing a small room or repainting a chalet, this guide covers how to measure your space, how much a 4-litre container typically covers, and how to use our built-in square footage calculator.

All values are approximate, as real-world coverage varies with surface condition, paint brand, sheen, and prep work.

What Is a Paint Calculator and Why Use One?

A paint calculator is a simple tool that helps you estimate how much paint you may need based on:

• Total square footage

• Number of coats

• Standard approximate coverage per 4-litre container

Using a calculator helps reduce:

• Overbuying (extra paint you don’t need)

• Underbuying (running out mid-project)

• Material waste

Most importantly, it gives you a rough idea of “How many square feet does a 4-litre can of paint cover?” for your specific room.

Key Benefits of Using a Paint Calculator

• Helps estimate paint needs based on your measured square footage

• Saves time by simplifying the math

• Reduces leftover products and waste

• Helps with budgeting before purchasing paint

• Offers a starting point before requesting a professional quote

If you're planning a full repaint and want pro assistance, you can learn more here: Interior House Painting »

How to Measure Your Space for Better Results

While the calculator provides approximate estimates, your measurements should be as accurate as reasonably possible. Here’s how to measure:

1. Measure wall height and width. Record the height and width of each wall.

2. Calculate total square footage. Multiply height × width for each wall, then add all wall totals together.

3. Subtract windows and doors. This small step improves the estimate for smoother, more efficient planning.

4. Include ceilings (optional). If you plan to paint your ceiling, measure the room length × width.

Measurement Checklist

• Measure each wall

• Add total square footage

• Subtract doors & windows

• Include ceilings and extra surfaces (if painting)

Once you have your measurements, you can plug them into our calculator below.

Understanding Paint Coverage: Litres, Quarts & Square Feet

Paint coverage varies based on the brand, sheen, and surface condition, but here are common approximate ranges:

4-Litre Container Coverage (Approx.)

A typical 4-litre container of paint covers:

~350–400 sq. ft. per coat

This number can fluctuate depending on:

• Porous surfaces

• Heavy texture

• Quality of paint

• Dark-to-light colour changes

• Wood surfaces

Homes with cedar or wood accents may absorb more paint. Learn more about those surfaces here: Wood Restoration »

1 Quart Coverage (Approx.)

A quart generally covers:

~90–100 sq. ft. per coat

This is useful for small areas, touch-ups, or accent walls.

Surface Texture Impacts Coverage

Textured, rough, or previously unpainted surfaces may require:

• More paint

• A primer coat

• Additional preparation

Our Wallpaper Installation page covers specialty surfaces that may also influence coverage needs.

Final Thoughts: Get the Most from Your Paint Estimate

Using a paint calculator is the quickest way to get a rough idea of how much paint your project may require. While the tool provides a solid starting point, remember that every home is different—especially in the Sea-to-Sky region.

For projects involving detailed trim, wood siding, high ceilings, specialty finishes, or exterior surfaces, a professional assessment ensures both accuracy and long-lasting results.

If you’re planning a project and want help choosing the right materials or confirming paint quantities, Pretty Good Painting is always here to help.

Explore our services here:

• Interior Painting

• Exterior Painting

• Commercial Painting