Cut and Fill Calculator: End Area vs Prismoidal
Wired White v1 Compare average end area and prismoidal earthwork volumes, include shrink and swell, and inspect a mass-haul diagram. A second mode estimates a building pad from a nine-point grid.
Civil and construction
Site and building engineering: concrete, steel and brick quantities, bar bending schedules, house frame loads, retaining walls, road curves, earthwork volumes and plot areas. Each calc shows its method and the public sources behind it; a structural design still needs a licensed engineer.
Wired White v1 
