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Bottom Paint Area Formula:
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The bottom paint area calculation estimates the surface area of a boat's hull that requires anti-fouling paint. This helps determine the amount of paint needed for proper coverage and protection against marine growth.
The calculator uses the standard formula:
Where:
Explanation: The formula provides a reliable estimate of the underwater surface area that requires painting, accounting for typical hull curvature.
Details: Accurate area calculation ensures you purchase the right amount of anti-fouling paint, avoiding waste or insufficient coverage. Proper paint application protects against marine growth and extends hull life.
Tips: Measure your boat's LOA (length from bow to stern) and beam (width at widest point) in meters. Enter these values to calculate the approximate surface area needing paint.
Q1: Why use the 0.75 multiplier?
A: The 0.75 factor accounts for typical hull curvature and provides a more accurate estimate than simple length × width calculation.
Q2: How much paint do I need based on this area?
A: Most anti-fouling paints cover approximately 10-12 m² per liter. Divide your calculated area by the coverage rate specified on your paint can.
Q3: Does this work for all boat types?
A: This formula works well for most monohull sailboats and powerboats. Multihulls, unusual hull shapes, or boats with complex keels may require adjustments.
Q4: Should I add a safety margin?
A: It's recommended to add 10-15% to the calculated area to account for overlap, primer coats, and potential waste.
Q5: How often should bottom paint be applied?
A: Most anti-fouling paints need reapplying annually, though some premium paints can last 2-3 seasons depending on water conditions and usage.