Free Civil Engineering
Civil engineering calculators cover beam analysis, concrete mix design, rebar scheduling, brick counting, staircase geometry, earthwork volumes, roof pitch, tile estimation, and construction cost — using IS and NBC standards. All calculations run in-browser. Suitable for preliminary design and quantity estimation.
15 tools available
Most Popular
Calculate reactions, shear force, bending moment, and deflection for simply supported beams under UDL, point load, or applied moment.
Try it free →Concrete Volume CalculatorCalculate concrete volume for slabs, beams, columns, footings, and staircases with M20 material quantities.
Try it free →Concrete Mix DesignDesign concrete mixes per IS 10262:2019 for M10 to M40 grades. Get cement, water, and aggregate quantities for any volume.
Try it free →All Civil Engineering (15)
Calculate reactions, shear force, bending moment, and deflection for simply supported beams under UDL, point load, or applied moment.
Open tool →Concrete Volume CalculatorCalculate concrete volume for slabs, beams, columns, footings, and staircases with M20 material quantities.
Open tool →Concrete Mix DesignDesign concrete mixes per IS 10262:2019 for M10 to M40 grades. Get cement, water, and aggregate quantities for any volume.
Open tool →Rebar CalculatorCalculate steel reinforcement weight and cost from bar schedules. Supports T6 to T32 with wastage and price per tonne.
Open tool →Brick CalculatorCalculate number of bricks for any wall with mortar quantities. Supports modular, standard Indian, and US brick sizes.
Open tool →Staircase CalculatorCalculate staircase risers, tread depth, stringer length, and NBC compliance using Blondel's formula.
Open tool →Paint CalculatorCalculate paint litres needed for any room. Accounts for doors, windows, paint type, coats, and coverage rate.
Open tool →Roof Pitch CalculatorCalculate roof pitch angle, slope percentage, pitch ratio, and rafter length from rise/run, angle, or pitch notation.
Open tool →Tile CalculatorCalculate tiles needed for any floor or wall area with grout joint, wastage, box count, and cost estimate.
Open tool →Construction Cost EstimatorEstimate house construction cost in India by area, floors, city tier, and construction type with trade-wise breakdown.
Open tool →Moment of Inertia CalculatorCalculate second moment of area (Ixx, Iyy) for rectangle, circle, hollow, I-section, and T-section profiles.
Open tool →Cantilever Beam CalculatorCalculate fixed-end moment, shear, and tip deflection for cantilever beams under UDL or point load.
Open tool →Cut & Fill CalculatorCalculate earthwork cut and fill volumes from a grid of elevations. Accounts for swell and shrinkage factors.
Open tool →Coordinate Area CalculatorCalculate polygon area, perimeter, and centroid from vertices using the Shoelace formula. Live diagram included.
Open tool →Bearing Capacity CalculatorCalculate ultimate and safe bearing capacity of soil using Terzaghi's theory and IS 6403 for strip and rectangular footings.
Open tool →Frequently Asked Questions
- Are civil engineering tools free?
- Yes. All civil engineering calculators are completely free with no sign-up, no usage limits, and no premium tier.
- Which design standards are used?
- Calculators follow Indian standards where applicable — IS 456 for concrete, IS 10262:2019 for mix design, IS 6403 for bearing capacity, NBC for staircase geometry (Blondel's rule). Formulas are cited within each tool.
- Are results accurate for real projects?
- Results use standard engineering formulas and are suitable for preliminary design and quantity estimates. For structural elements that affect safety, always verify with a licensed structural or geotechnical engineer.
- Which civil engineering calculators are available?
- Stax includes simply supported and cantilever beam calculators, concrete volume calculator, M10–M40 concrete mix design, rebar scheduler, brick calculator, staircase calculator, paint estimator, tile calculator, roof pitch calculator, cut and fill calculator, coordinate area calculator (Shoelace formula), moment of inertia calculator, bearing capacity calculator, and construction cost estimator.
- Is my project data stored?
- No. All calculations run in your browser. Stax does not store or transmit any project data.