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Slope Formula:
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Slope percentage is a measure of the steepness or incline of a surface, expressed as a percentage. It represents the ratio of vertical rise to horizontal run multiplied by 100, commonly used in terrain analysis, construction, and engineering.
The calculator uses the slope percentage formula:
Where:
Explanation: This formula calculates the percentage slope by dividing the vertical change by the horizontal distance and converting it to a percentage value.
Details: Slope percentage is crucial in civil engineering, construction, landscaping, road design, and terrain analysis. It helps determine drainage patterns, accessibility requirements, and structural stability.
Tips: Enter vertical rise and horizontal run in meters. Both values must be positive numbers greater than zero. The calculator will compute the slope percentage automatically.
Q1: What is considered a steep slope?
A: Generally, slopes above 15% are considered steep, while slopes above 25% are very steep and may require special engineering considerations.
Q2: How does slope percentage relate to degrees?
A: Slope percentage = tan(angle in degrees) × 100. For example, a 45° angle equals 100% slope.
Q3: What are typical slope percentages for roads?
A: Main roads typically have slopes under 6%, while residential streets may go up to 10%. Mountain roads can exceed 15%.
Q4: How is slope used in drainage design?
A: Proper slope ensures adequate water flow. Minimum slopes of 1-2% are typically required for effective drainage in pipes and gutters.
Q5: Can this calculator be used for roof slopes?
A: Yes, this calculator works for roof slopes as well. Roof slopes are often expressed as ratios (e.g., 4:12) which can be converted to percentage.