Every result traced to its code clause
Free civil and structural calculators for engineers in the Gulf and Pakistan — ACI, BS and Eurocode, local units and rates, full working shown. Built and reviewed by a registered civil engineer.
Concrete Mix Calculator
Nominal mix quantities and ACI 211.1 design mix with exposure checks, batch weights and printable report.
Rebar & SteelBar Bending Schedule Generator
Cutting lengths, weights and shape sketches by shape code; member-based BBS and stock-bar order list.
EstimationBOQ / Quantity Estimator
Item-wise BOQ priced with official market rates (Punjab MRS first), quick and detailed modes.
StructuralRC Beam Designer
Flexure, shear with size effect, SMRF/IMF capacity design and hoop layout, torsion, deflection and laps – with live drawings.
Rebar & SteelDevelopment & Lap Length
Straight, standard-hook and compression development lengths and Class B / compression laps, with all ψ factors shown.
StructuralPunching Shear
Two-way shear at interior, edge and corner columns with unbalanced moment transfer (γv, Jc) and stud/stirrup design.
StructuralSlab Designer
One-way slabs by ACI moment coefficients or your moments: steel, spacing, distribution bars, shear and minimum thickness.
StructuralCrack Control
ACI 318-19 bar-spacing rule plus Gergely–Lutz and Frosch crack widths against ACI 224R guide limits.
StructuralRC Column Designer
Rectangular tied columns: P–M diagrams about both axes, biaxial check, non-sway slenderness, ties and shear.
StructuralStaircase Designer
Waist-slab stairs with landing: loads on plan, moment, main and distribution steel, shear and minimum thickness.
Site toolsBrick & Block Calculator
Bricks or blocks, cement bags and sand for walls with openings, mix ratio and wastage.
Site toolsPlaster, Tile & Paint
Plaster cement and sand, tiles with adhesive and grout, and paint, primer and putty in litres and gallons.
Geotech & FoundationsBearing Capacity
Ultimate and allowable bearing of shallow footings: shape, depth and inclination factors, groundwater and eccentric loads.
Geotech & FoundationsIsolated Footing
Pad footing with moment: soil pressure, one-way and punching shear with moment transfer, band steel, development and bearing.