△ Surveyor's Calculator

Select a calculator from the menu above to get started.

Bearing Conversion

Convert between DMS, Decimal Degrees, Quadrant bearings and Azimuths.
DMS ↔ Decimal Degrees
Quadrant Bearing ↔ Azimuth

Traverse / COGO

From a known point, compute a new coordinate using a bearing and distance.
Known Point
Bearing (Azimuth)

Inverse (Coordinates → Bearing & Distance)

Enter two known points to compute the bearing and distance between them.
Point 1
Point 2

Horizontal Curve

Enter radius and delta angle to calculate all curve elements.
Delta Angle (Δ)

Slope Reduction

Reduce slope distance and vertical angle to horizontal distance and height difference.
Vertical Angle — Elevation Angle (+ up, − down)

Rise & Fall / Reduced Levels

Enter BS, IS, FS for each station. Starting RL required. Leave unused rows blank.
Station BS IS FS Rise Fall RL
Totals

Grade Calculator

Enter two reduced levels and the horizontal distance between them.

Area & Unit Converter

Enter area in any unit — all others update automatically.
Area Conversions
Chain / Link → Metres

📌 GPS Location

Uses device GPS to capture your current position. Tap the button and allow location access when prompted.

Basic Calculator

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Disclaimer & GPS Notice
2026 Paul Kruger | Available at WebGoodies