Calculator catalog
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Found 78 calculators
Steel member mass from area and length
Calculates steel member mass from cross-sectional area, length, and user-provided density.
Simple steel axial stress
Calculates axial stress as axial force divided by cross-sectional area.
Required steel area for axial force
Calculates required cross-sectional area from axial force and chosen allowable stress.
Simple steel column slenderness
Calculates slenderness as effective length divided by radius of gyration.
Euler buckling load of a steel column
Helper calculation of ideal Euler critical load; it is not code-based design or column capacity verification.
Required steel section modulus
Helper calculation of required section modulus from moment and allowable stress; it is not code-based design.
Slab self-weight
Calculates slab area load from thickness, density, and gravitational acceleration.
Reinforcement ratio of a rectangular section
Calculates reinforcement ratio from steel area, section width, and effective depth.
Simplified reinforced-concrete moment capacity
Estimates moment from steelArea * yieldStress * leverArm; this is not code-based design.
Concrete cover from effective depth
Calculates the geometric difference between total depth and effective depth.
RC bar count from area
Helper calculation of theoretical bar count from required steel area and single bar area; it is not code-based design.
Roof slope percent
Calculates roof slope percent from rise and horizontal run.
Roof angle from rise and run
Calculates roof pitch angle as arctangent of rise divided by run.
Roof area from plan area and angle
Converts roof plan area into approximate sloped roof area using the pitch angle.
Roof area from plan and slope
Calculates sloped roof area from plan area and roof angle plus required material area with waste.
Stair riser height
Calculates single riser height from total rise and riser count.
Stair slope angle
Calculates stair slope angle from riser height and tread depth.
Wall area with openings
Helper calculation of net wall area after subtracting openings; it is not code-based design.
Roof rafter length
Helper calculation of geometric rafter length from run and rise; it is not code-based design.
Blondel helper value
Helper calculation of stair geometry value 2h + s; it is not a code check or code-based design.
Soil unit weight
Calculates soil unit weight as sample weight divided by sample volume.
Vertical soil stress
Calculates simple vertical soil stress from unit weight and depth.
Simple lateral earth pressure
Simplified lateral pressure calculator from coefficient, unit weight, and depth; it is not code-based retaining-wall design.
Rankine active earth pressure with surcharge
Calculates an indicative active soil and surcharge resultant per meter of wall; it is not retaining-wall design.
Rankine passive earth pressure
Calculates an indicative passive pressure resultant per meter of wall from friction angle and soil unit weight.
Hydrostatic pressure behind wall
Calculates water-pressure resultant, resultant location, and base pressure for a given water height.
Infinite slope safety factor
Calculates an indicative infinite-slope safety factor from user-provided strength parameters and pore pressure.
Soil porosity
Helper calculation of porosity as void volume divided by total volume; it is not code-based design.
Soil gradation coefficients Cu and Cc
Calculates Cu = D60/D10 and Cc = D30^2/(D10*D60) from values read from a gradation curve.
Darcy flow through soil
Calculates gradient i = Δh/L, flow Q = k*A*i, and Darcy velocity q = k*i.
Constant-head permeability test
Calculates k = V*L/(A*Δh*t), where V is the measured flow volume.
Falling-head permeability test
Calculates k = (a*L/(A*t))*ln(h1/h2) for positive heads h1 > h2.
Consolidation time factor
Calculates T_v = c_v*t/H_dr^2 and inverse modes for time, c_v, and drainage path.
U to T_v consolidation approximation
Calculates approximate T_v from U: for U <= 0.60 it uses (pi/4)*U^2, for larger U it uses -0.933*log10(1-U)-0.085.
Boussinesq point-load stress
Calculates vertical stress σ_z below a point load P at radial distance r and depth z.
Bearing capacity with manual factors
Calculates q_ult = c*Nc + q*Nq + 0.5*gamma*B*Ngamma from manually supplied factors and multipliers.
Simple elastic settlement
Calculates S = q*B*(1-nu^2)*I_s/E_s with manually supplied influence factor I_s.
Concrete volume for a rectangular shape
Calculates concrete volume from the length, width, and height of an element.
Concrete volume for a slab
Calculates concrete volume from slab area and thickness.
Reinforcement mass from length and diameter
Calculates approximate reinforcing bar mass using the practical formula m = L * d² / 162.
Strip foundation volume
Calculates simple strip foundation volume from length, width, and depth.
Average soil bearing pressure
Calculates simple average soil pressure as load divided by base area.
Foundation eccentricity
Helper calculation of eccentricity from moment and vertical load; it is not code-based design or capacity verification.
Foundation average pressure
Helper calculation of average pressure as vertical load divided by area; it is not code-based design or soil capacity.
Rectangular footing eccentric pressure, one axis
Calculates average pressure, eccentricity, and edge pressures for a rectangular footing with one-axis moment.
Rectangular footing corner pressures
Calculates four corner pressure combinations for a rectangular footing with two-axis moments.
Simple single pile capacity
Calculates indicative pile capacity from user-supplied base resistance, shaft resistance, and safety factor.
General wind load
Calculates q = 0.5*rho*v^2, p = q*C_total, F = p*A, and M = F*e from manually supplied coefficients.
General snow load
Calculates s = μ_i*C_e*C_t*s_k from manually supplied coefficients and s_k.
Line load from area load and width
Converts an area load into a line load using tributary width.
Point load from line load
Converts a line load to a point load for assigned tributary length L_tr.
Total force from area load
Converts an area load to total force using F = p*A.
Point load from mass
Calculates a point load from mass and user-supplied gravitational acceleration.
Self-weight from density and volume
Calculates self-weight from density, volume, and gravitational acceleration.
Area load from mass and area
Distributes mass as an area load over a given area using the supplied gravitational acceleration.
Surface load from thickness and density
Calculates layer area load from thickness, density, and gravitational acceleration.
Total area load
Sums four signed area-load components using the user's sign convention.
Total line load
Sums four signed line-load components using the user's sign convention.
Column load from tributary area
Multiplies area load by tributary area to estimate a column load.
Load per support
Divides total load by support count without imposing a support type.
Manual linear load combination
Combines three line loads with factors entered manually by the user; it is not a combination from any specific code.
Block count for a wall
Estimates block count from wall area, block dimensions, and waste percentage.
Mortar volume for a wall
Estimates mortar volume from wall dimensions and mortar share percentage.
Concrete bags count
Helper estimate for bag count from concrete volume and one-bag yield; it is not code-based design.
Rectangular foundation formwork area
Helper estimate for side formwork area of a rectangular foundation; it is not code-based design.
Rectangular excavation volume
Helper estimate for rectangular excavation volume from dimensions; it is not code-based design.
Cost with waste factor
Helper estimate for total cost after adding a waste percentage; it is not code-based design.
Wall finish area
Calculates gross area, net area, and required material area for coat count and waste.
Asphalt mass from area and thickness
Calculates asphalt layer volume and mass from area, thickness, and user-supplied density.
Preliminary base plate analysis
Preliminary rectangular base plate analysis: pressure map from N, Mx and My, cantilever thickness and anchor force distribution.
Preliminary retaining wall check
Preliminary cantilever retaining-wall analysis per 1 m length: Rankine or user Ka pressure, water, uplift, passive resistance, sliding, overturning, contact and base bearing pressures.
Rectangular reinforced-concrete beam analysis
Rectangular reinforced-concrete beam section analysis with force equilibrium, reinforcement layers, user stress block, cracking and shear checks from user-provided capacity.
Shallow foundation analyzer
Preliminary rectangular shallow-foundation analysis with biaxial eccentricity, tensionless contact, uplift, bearing capacity, sliding and elastic settlement from user-defined limits.
Wind, snow and seismic actions
Four calculation modules for wind, snow, seismic base shear and transparent action combinations, without automatic zone lookup.
Steel connection design
Modular bolt shear, plate bearing and fillet-weld checks with component resistances and a governing failure mode.
Reinforced concrete design suite
Two explicit simplified EN 1992-1-1 beam flexure and concrete-shear models plus a clearly limited linear N–M column-section screening check.
Geotechnical design suite
Transparent shallow-foundation bearing check with analytical capacity factors and user-supplied modifiers.
Structural profiles database
IPE and HEA section database with dimensions, mass and section properties tied to an explicit series and source.