Pick a project on the left or create a new one. Free, no sign-up. Points are anonymous numbers in a local grid; the calculation runs server-side on the same engine that passes the automated test suite.
FAQ
How accurate is the calculation?
Volumes are integrated analytically over a Delaunay TIN: prisms over each triangle, with exact splitting of triangles crossed by the reference plane. The engine is verified against closed-form solutions (pyramid, wedge, plane pairs) to a relative error of 1e-6.
What data do I need?
Only anonymous numbers: X, Y, Z rows pasted from Excel or uploaded as XLSX/CSV. Coordinates may be in any local grid. No drawings or sensitive documents.
Can I compare two surveys?
Yes: surface B is interpolated over surface A and the difference is integrated across the common area (intersection of convex hulls), returning cut, fill and net volumes.