Patio Slope Calculator
Calculate the proper slope for your patio to ensure proper drainage. Determine the required fall based on patio dimensions and recommended slope percentage.
Step 1: Patio Dimensions
Understanding Patio Slope
Proper slope (typically 1-3%) is essential for patio drainage. Too little slope causes water pooling, while too much can be uncomfortable. The slope should always direct water away from your house foundation.
Step 2: Calculation & Results
Slope Recommendations
Standard patio slope is 1-3% (1/8″ to 1/4″ per foot). For porous materials like gravel, use 2-3%. For impervious surfaces like concrete, 1-2% is usually sufficient.
Patio Slope Results
Required Total Fall
Patio Material Slope Comparison
| Material Type | Recommended Slope | Drainage Efficiency | Fall for 10ft |
|---|
Slope Calculation Breakdown
Slope Formula
Fall = Length × (Slope% ÷ 100)
To calculate the required fall (vertical drop) for proper drainage, multiply the patio length by the slope percentage (converted to decimal). For example: 10ft × (2% ÷ 100) = 0.2ft = 2.4 inches of total fall.
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