Elevation Difference Calculator

Compute elevation difference from trigonometric leveling observations.

Slope Distance (ft)

Vertical Angle (degrees, + up / - down)

Instrument Height (ft)

Target/Prism Height (ft)

Known Elevation of Instrument Point (ft)

Elevation Difference

Target Elevation

Horizontal Distance

Vertical Component

Earth Curvature + Refraction

Trigonometric Leveling Formula

dElev = SD * sin(VA) + HI - HT + C&R

HD = SD * cos(VA)

C&R = 0.0206 * (HD/1000)^2 (in feet, for miles: 0.574 * M^2)

Differential leveling.

Total station calculations.

Slope conversions.

Profile generation.

Vertical curve design.

Earthwork volumes.