This calculator will calculate the drop in inches, the difference in elevation, from a slope expressed as a percentage.

Formula used : elevation change = ( percentage ÷ 100) * length

Example calculation

a trench 20 feet long requires a 2% slope

convert 20 feet to inches

20 * 12 = 240"
240 * (2  ÷ 100) =
240 * 0.02 =  4.8 = 4 13/16"

Calculation

1. length in feet & inches
2. required slope in a percentage
3. fraction precision preset @16

Result

1. required drop in inches

Excavated Materials and Trucking

• Excavation Material Removal Calculator Swell and Shrinkage
• Material from a Rectangular Shaped Excavation
• Number of Truckloads - Imperial
• Number of Truckloads - Metric
• Rectangle Pyramid Pile
• Rectangle Pyramid Pile - Metric
• Volume of a Cone Shaped Pile Calculator
• Volume of a Cone Shaped Pile Calculator - Metric
• Volume of a Pile Calculator
• Volume of a Pile Calculator - Metric

Equipment

• Excavator/Tractor Fuel Consumption per Hour

Factors, Grades, Percentages

• Elevation Grade Slope in a Percentage, Millimetres
• Elevation Grade from Inches per Foot
• Elevation Grade from a Percentage
• Grade Percentage to Angle in Degrees
• Horizontal Length from Angle and Slope Length
• Spike's Compaction Factor Calculator
• Shrink and Load Factor Calculator
• Slope Percent and Angle of the Slope - Metric
• Swell and Load Factor Calculator
• Vertical Depth from a Slope Percentage and Horizontal Length

Information

• List - Bulking/Swell of Excavated or Mined Materials
• List - Swell and Shrinkage of Excavated Materials List