Professional-grade surveying and engineering tools for engineers, contractors, and students — completely free to use.
Estimate your house construction cost with our detailed package-based calculator.
Calculate earthwork volume using the Trapezoidal Rule from cross-section areas.
Calculate area from coordinates using the Shoelace Formula. Results in m², sqft, acres, and hectares.
Calculate volume for rectangular and cylindrical shapes in m³, cft, and liters.
Draw a cross-section profile from distance and level data. Visualize terrain profiles.
Draw a longitudinal section from chainage, ground level (GL), and optional formation level (FL) data.
Enter cross-section areas (in m²) one per line or comma separated. Specify the interval distance between sections in meters.
Enter X,Y coordinate pairs one per line. Minimum 3 points needed. Coordinates should form a closed polygon (auto-closes).
For rectangular: enter Length, Breadth, Height in meters. For cylindrical: enter Diameter and Height in meters.
Cross Section: Distance,Level per line. L-Section: Chainage,GL,FL per line (FL is optional). All values in meters.