Gutter Capacity Calculator
Calculate your gutter system’s water handling capacity. Determine if your gutters are sized properly for heavy rainfall in your area.
Step 1: Roof & Gutter Details
Understanding Gutter Capacity
Gutter capacity depends on roof area, gutter size, and local rainfall intensity. Larger roofs and heavier rainfall require larger gutters to prevent overflow and water damage.
Step 2: Rainfall & Location
About Rainfall Intensity
Rainfall intensity measures how much rain falls in a specific time period. Higher intensities (heavy downpours) require greater gutter capacity to handle the increased water flow from your roof.
Gutter Capacity Results
Maximum Water Handling Capacity
Gutter Size Comparison
| Gutter Size | Material | Max Capacity | Required Capacity | Performance |
|---|
Capacity vs Rainfall Intensity
Gutter Capacity Calculation Formula
Required Capacity = (Roof Area × Rainfall Intensity × 0.0104) × Roof Slope Factor
The required gutter capacity is calculated by multiplying roof area by rainfall intensity and applying appropriate conversion factors. Roof slope affects water velocity and must be considered for accurate sizing.
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