Home
Back
Slope Formula:
| From: | To: |
Slope percentage is a measure of the steepness or incline of a surface, expressed as a percentage. It represents the vertical rise divided by the horizontal run, multiplied by 100. This calculation is essential in construction for proper drainage, road design, and structural stability.
The calculator uses the slope percentage formula:
Where:
Explanation: The formula calculates the ratio of vertical change to horizontal distance and converts it to a percentage for easy interpretation in construction applications.
Details: Accurate slope calculation is crucial for proper drainage systems, road construction, ramp design, foundation work, and ensuring structural integrity. It helps prevent water accumulation, ensures vehicle safety, and maintains building code compliance.
Tips: Enter rise and run values in meters. Both values must be positive numbers greater than zero. The calculator will automatically compute the slope percentage.
Q1: What is the difference between slope percentage and slope ratio?
A: Slope percentage expresses the incline as a percentage (rise/run × 100), while slope ratio expresses it as a ratio (rise:run).
Q2: What are typical slope percentages used in construction?
A: Typical values include: 1-2% for drainage, 5-8% for accessible ramps, 10-15% for driveways, and up to 25% for steep roads.
Q3: How do I measure rise and run on a construction site?
A: Use surveying equipment like levels and measuring tapes, or laser distance meters for accurate measurements over longer distances.
Q4: Can this calculator be used for roof slopes?
A: Yes, the same formula applies to roof slopes, though roof slopes are often expressed as ratios (e.g., 4:12) in construction.
Q5: What is the maximum recommended slope for various construction applications?
A: Maximum slopes vary by application: 8.33% for ADA ramps, 15% for residential driveways, 25% for major roads, and local building codes may specify other limits.