Vertical Difference Calculator
Computes the vertical height difference from a slope distance and vertical angle.
Enter Values
Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.
How to use this calculator
- Enter the slope distance and the vertical angle from horizontal.
- Press Calculate.
- Read the height difference and horizontal distance.
How it works
Height difference ΔH = slope distance × sin(vertical angle); horizontal distance = slope distance × cos(vertical angle). Use a negative angle for a depression.
Worked example
50 m at 6°. ΔH ≈ 5.2 m, horizontal ≈ 49.7 m.
Frequently asked questions
Is the angle from horizontal or vertical?
From the horizontal. A downward sight uses a negative angle.
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- Slope & Horizontal Distance Calculator
- Grade & Fall Calculator
- Basic Traverse Table Builder
- Contour Interpolation Calculator
- Exterior Angle Balance Table
- Height of Collimation Worksheet
Explore more in Surveying, Coordinates, GIS & CAD.
Cite this tool
Zerdly. (2026). Vertical Difference Calculator. Retrieved from https://www.zerdly.com/tools/vertical-difference-calculator/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.