What Is the Paint/Stain Calculator?
Calculate paint or stain coverage for stair treads, risers, stringers, and railings. This calculator determines the total surface area, accounts for multiple coats, and converts to gallons and quarts needed. Accurate coverage estimation prevents mid-project paint store runs and ensures color consistency.
How to Use This Calculator
- Enter tread depth, riser height, stair width, and number of steps.
- Set the number of coats (2 is standard for most paints).
- Enter the paint coverage per gallon (typically 350 ft² for interior paint).
- Review total surface area, area with coats, and gallons/quarts needed.
Why Accurate Paint/Stain Calculations Matter
Stairs are high-traffic surfaces that require durable, non-slip paint or stain. Porch and floor paint costs $30–$60 per gallon, and buying the right quantity avoids batch color variation. For stair treads, always use paint rated for floors with anti-slip additives.
Building Code References
Related Tools
Frequently Asked Questions
How much paint do I need for stairs?+
A typical 14-step, 36-inch-wide staircase has about 80–100 square feet of paintable surface. At 350 ft²/gallon coverage, two coats require approximately 0.5–0.6 gallons.
Should I use paint or stain on stairs?+
Stain preserves the wood grain appearance and is popular for hardwood treads. Paint provides more color options and better wear resistance. For treads, always use a floor-rated product with anti-slip properties.