Vertical Curve Designer

Enter the two grades, the curve length, and the PVI station & elevation. The app finds the PVC and PVT, the highest/lowest point, the vertical offset at the PVI, and the elevation at every full station — symmetrical or unsymmetrical.

🆓 Free design tool — design as many vertical curves as you like · Balance … EP

① Curve type

Incoming grade g₁ (%)

Outgoing grade g₂ (%)

Curve length L (m)

Left length L₁ (m)

Right length L₂ (m)

Use signed grades (uphill +, downhill −). A crest has g₁ > g₂; a sag has g₁ < g₂.

② PVI & stationing

PVI station

PVI elevation (m)

Station interval for the elevation table (m)

Metric stationing: 10+000 means 10 000 m.

📈 Vertical curve

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Sta PVC

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Elev PVC

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Sta PVT

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Elev PVT

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High/Low station

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High/Low elevation

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Vertical Curve Designer

① Curve type

② PVI & stationing

📈 Vertical curve

Worked solution

Elevation table