Spike's Calculators

This calculator will calculate the drop or rise in inches, the difference in elevation, from a slope expressed in inches per foot.

a 40 foot length of pipe requires a 1/8" drop per foot 40 * 1/8 = 40/8 = 5The required drop from start of the pipe to the end is 5"

- length in feet & inches
- required slope inches per foot
- fraction precision preset @16

- required drop in inches

- 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

- 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
- Swell and Load Factor Calculator
- Vertical Depth from a Slope Percentage and Horizontal Length