Civil Engineering Calculation Suite
Job-site ready, IS/IRC compliant engineering calculators and structural design tools. Zero ad interruptions, interactive SVG cross-sections, and printable calculation site memos.
Indian Land Unit Converter
Bidirectional live conversion for Bigha, Guntha, Cottah, Chatak, Kanal, Marla, Ground, Cent, Brass, CFT, and Sq. Feet.
RCC Beam Design (IS 456:2000)
Moment of resistance (Mu), neutral axis depth (xu), steel percentage (pt), and shear stirrup spacing with SVG cross section.
IS 456 Column Design & Axial Capacity
Short column factored axial capacity (Pu), slenderness ratio check, minimum eccentricity (emin), and lateral tie design.
Isolated RCC Footing Design
Pad footing sizing, one-way beam shear, two-way punching shear at d/2, and flexural bottom reinforcement mesh.
Development Length & Lap Splice
Calculate development length (Ld), tension/compression lap splices, bond stress (τbd), and 90°/135°/180° hook credits.
Concrete Mix Design (IS 10262:2019)
Target mean strength, w/c ratio, absolute volume method, fly ash replacement, and batch mix proportions per 50kg bag.
Bar Bending Schedule (BBS)
Rebar cutting length calculator with 90°/135° hook allowances, unit weights (D²/162), and total project steel tonnage.
Brickwork & Plaster Estimator
Compute standard modular/traditional bricks, cement bags (50kg), and dry sand volume (m³ & cft) with mortar ratios.
Soil Safe Bearing Capacity (SBC)
Terzaghi and IS 6403 bearing capacity analysis. General/local shear failure, Nc/Nq/Nγ factors, and water table correction.
Flexible Pavement Design (IRC 37:2018)
Cumulative traffic in MSA, subgrade resilient modulus (MR), and crust layer thicknesses for BC, DBM, WMM, and GSB.
Indian Standard (IS) Codes Library
Searchable directory of Indian Standards for concrete, structural steel, earthquake, soil mechanics, and highway codes.
Civil Drawing Books & Detailing
Standardized architectural drafting manuals, reinforcement detailing schematics, and blueprint reading guides.
Why Civil Engineers Trust Spireix Over Legacy Sites
Comparing Spireix against ad-heavy portals like CivilConcept and CivilCalc.
Instant Interactive Diagrams
SVG cross-sections render your beams, columns, footing shear lines, and pavement crusts in real-time as you adjust parameters.
Clean Job-Site PDF Memos
Print structured calculation reports with project headers, material batch proportions, and code citations directly for client sign-off.
Zero Popup Ads
Engineered for fast field calculations without banner ads obstructing your screen in mobile browsers on the construction site.