Every calculator runs right in your browser. Free tools are open to everyone; premium tools unlock instantly with a one-time payment. Free covers a G+0 building up to 800 sft; the Android app unlocks larger projects and the full bar bending schedule.
Looking for the WBPSC AE or Civil Engineering mock tests? They've moved to PSC Exam — 2 free attempts each.
The complete RCC framed-building estimator — quantities, member sizing, BBS, and cost, G+0 to G+3, from just plinth area and storeys. Free for a G+0 house up to 800 sft; Pro removes the limit. Opens in its own tab.
Open the app › LiveMaterial and cost estimate for a compound/boundary wall from its length and height.
Open the calculator › LiveMarshall Method — aggregate blend, specimen volumetrics, OBC estimation and a MoRTH-style acceptance check.
Open the calculator › LiveEquilibrium cant, cant excess, and transition length & shift for a curved track, following IRPWM practice.
Open the calculator › LiveMaximum scour depth by the Lacey/constricted-channel methods, with a foundation depth safety check.
Open the calculator › Live · Free to useDraw a roof truss on a grid, like in STAAD, or start from a ready Pratt, Howe, Fink or flat shape. Works out IS 875 dead, live and wind loads, analyses the truss, picks angle, channel or ISMB sections to IS 800 with bolted or welded connections, then designs the supporting RCC column or beam to IS 456. Save your file and reopen it later.
Open the designer › New · Free · PDF report ₹49Mark columns and beams on your house plan, set the floor heights and concrete grade, and the whole building is analysed as a 3D frame for dead, live, earthquake (IS 1893) and wind (IS 875) loads. Free on screen: bending moment, shear force and axial force in every beam, column and slab, BMD/SFD, member sizes, IS 456 / IS 13920 reinforcement, isolated footings and the bar bending schedule with cutting lengths. The printable PDF report is ₹49 per design, no sign-in.
Open the designer › Live · Free to useDraw a beam, frame or truss on the grid, assign pin, roller or fixed supports, add internal hinges, and apply point loads or UDLs. Solved by the direct stiffness method — the same matrix approach full structural analysis software uses — and returns the bending moment and shear force diagrams with values labelled at every support, load point and peak.
Open the calculator › Live · Free · PDF booklet ₹49A complete Intze tank design, free to read on screen — geometry, dead/live/wind/seismic loads, the top dome, wall, ring beams, conical slab, bottom dome, circular girder, staging and foundation, each with a PASS/REVIEW/FAIL check, and a summary bar bending schedule with bar-shape sketches. Every input has a plain-language note explaining it. The print-ready PDF booklet is ₹49 per design, with no sign-in.
Open the calculator › LiveRecommended septic tank dimensions for residential use, for up to 20 users.
Open the calculator › Premium — Rs. 49Cantilever/gravity retaining wall sizing and stability check to IS 456:2000.
Open the calculator › Premium — Rs. 49IS 456/875-based cantilever slab sizing and reinforcement.
Open the calculator › Premium — Rs. 49Preliminary column and beam sizing for a basic G+3 house.
Open the calculator › Premium — Rs. 49IS 875/456-based building load takedown, seismic included.
Open the calculator ›Quick bar-weight and cutting-length reference for common reinforcement sizes.
Room-wise paint and tiling estimate from wall and floor dimensions.