Home
Back
Percent Slope to Inches per Foot Formula:
| From: | To: |
The Percent Slope to Inches per Foot conversion is a mathematical relationship used to express slope measurements in different units. It converts percentage slope (rise over run expressed as a percentage) to inches of rise per foot of run.
The calculator uses the conversion formula:
Where:
Explanation: The formula converts the percentage to a decimal (by dividing by 100) and then multiplies by 12 to find how many inches of rise occur over one foot of run.
Details: Accurate slope conversion is crucial in construction, landscaping, road design, and various engineering applications where precise measurements are required for proper drainage, accessibility, and structural integrity.
Tips: Enter the slope percentage value. The calculator will automatically compute the equivalent inches per foot. All values must be valid (percentage ≥ 0).
Q1: Why convert percent slope to inches per foot?
A: Different industries use different measurement systems. Construction often uses inches per foot, while engineering may use percentages. Conversion allows for clear communication between professionals.
Q2: What is a common slope percentage for drainage?
A: For proper drainage, a minimum slope of 2% (which equals 0.24 inches per foot) is typically recommended.
Q3: How steep is a 100% slope?
A: A 100% slope equals 12 inches per foot, which represents a 45-degree angle (rise equal to run).
Q4: Can this conversion be used for roof pitch?
A: Yes, roof pitch is often expressed as inches of rise per foot of run, making this conversion useful for roofing calculations.
Q5: Is there a maximum practical slope percentage?
A: While mathematically unlimited, practical slopes for vehicles are typically under 15-20%, and for pedestrians under 10-12% for accessibility.