Elevation between 100 and 102 m
At stations 0 and 100 m the elevations are 100 and 102 m. At station 50 m, linear interpolation gives 101.000 m.
Vertical Alignment Design
Vertical Alignment Design on Straight Line Calculator
Calculate elevations along a straight grade from two known points or a known elevation and grade.
Computes finished elevations along a straight vertical grade — at any station or at fixed intervals — including pavement-edge and shoulder-edge elevations from a standard crowned cross-section.
1 · How is the grade defined?
Choose the inputs you already have.
2 · Alignment data
Station format accepts chainage (e.g. 0+000, 1+250.50) or plain metres.
Compute at
Elevation type
Road cross-section parameters
Results
Grade —
Method & practical use
Understand the result.
Calculate elevations along a straight grade from two known points or a known elevation and grade.
How to use this tool
- Select the geometry or design case and confirm the displayed units.
- Replace sample inputs with the project values, then calculate or review the live result.
- Check the method, assumptions and output; save or print the calculation with its input record.
Units & method
Stations and elevations in m; grade in %.
z = z0 + (grade/100)(station − station0). The two-point grade is 100(z2 − z1)/(station2 − station1). This is coordinate geometry, with no road-design standard implied.
Method: the owner’s supplied worksheet and the arithmetic described above.
Worked examples
Illustrative inputs for checking the method; these are not project records.
Elevation between 200 and 199 m
At stations 0 and 100 m the elevations are 200 and 199 m. At station 50 m, linear interpolation gives 199.500 m.
Frequently asked questions
What does this tool calculate or track?
Calculate elevations along a straight grade from two known points or a known elevation and grade.
Which units and assumptions should I use?
Stations and elevations in m; grade in %. z = z0 + (grade/100)(station − station0). The two-point grade is 100(z2 − z1)/(station2 − station1). This is coordinate geometry, with no road-design standard implied.
Can I save or share the result?
Use the save, export and print controls shown in this workspace. Where CSV export is available, the exported data can be opened in a spreadsheet. Browser print can save a PDF.