Engineering calculators that show their working.

Every result comes with the formula, your numbers substituted, the assumptions and the reference. Every tool is tested against textbook solutions before it goes live.

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C-01 · STRUCTURAL Beam calculator Reactions, shear, moment, deflection, stress Open →

C-02 · STRUCTURAL Centre of gravity & support reactions Point masses → CoG → load per support, equal-load optimiser Open →

C-03 · STRUCTURAL Column buckling Eigenvalue buckling: critical loads, mode shapes, effective length Open →

C-04 · STRUCTURAL Section properties & builder A, I, W, i, J, shear centre — standard or custom shapes Open →

C-05 · STRUCTURAL 2D frame & truss analysis Member forces, displacements, diagrams Open →

NEW

C-10 · LOADS Wind load Peak velocity pressure, pressure coefficients Open →

1 kN=224.809 lbf

1 MPa=145.038 psi

1 kN·m=737.562 lbf·ft

1 kW=3 412.14 BTU/h

C-20 · UTILITIES · [NEXT] Unit converter Force, stress, moment, energy, power, temperature… Coming next

ALL TOOLS & ROADMAP

What we have — and what's coming.

READYdesignedNEXTin buildROADMAPplannedACCOUNTfree sign-inPRO$10 / month

IDTOOLMETHOD / REFERENCECATEGORYSTATUS

C-01 Beam calculatorReactions, shear, moment, deflection, stress Beam tables · Roark STRUCTURAL READY C-02 Centre of gravity & support reactionsPoint masses → CoG → load per support, equal-load optimiser Statics · rigid body STRUCTURAL READY C-03 Column bucklingEigenvalue buckling: critical loads, mode shapes, effective length Euler · eigenvalue problem STRUCTURAL READY C-04 Section properties & builderA, I, W, i, J, shear centre — standard or custom shapes Thin-walled theory STRUCTURAL READY C-05 2D frame & truss analysisMember forces, displacements, diagrams Direct stiffness method STRUCTURAL READY

C-06 3D frame analysisSpace frames, 6 DOF per node Direct stiffness method STRUCTURAL ROADMAP

C-07 Steel member checkAxial, bending, shear and interaction EN 1993-1-1 · AISC 360 STRUCTURAL ROADMAP

C-08 Bolt group & fillet weldEccentric shear, tension, weld throat EN 1993-1-8 STRUCTURAL ROADMAP

C-09 Base plate & anchorsBearing, plate bending, anchor tension EN 1993-1-8 · EN 1992-4 STRUCTURAL ROADMAP

C-10 Wind loadPeak velocity pressure, pressure coefficients EN 1991-1-4 · ASCE 7 LOADS READY

C-11 Snow loadGround to roof snow load, shape coefficients EN 1991-1-3 LOADS ROADMAP

C-12 Load combinationsULS / SLS combinations generator EN 1990 · ASCE 7 §2 LOADS ROADMAP

C-13 Seismic response spectrumElastic and design spectra EN 1998-1 §3.2.2 LOADS ROADMAP

C-14 Natural frequencyBeams, plates, spring–mass systems Closed-form solutions DYNAMICS NEXT

C-15 Vibration isolationTransmissibility, isolator selection SDOF theory DYNAMICS ROADMAP

C-16 Heat conduction & finsMulti-layer walls, fin efficiency Fourier's law THERMAL & FLUID ROADMAP

C-17 Pipe pressure dropFriction loss, minor losses Darcy–Weisbach · Colebrook THERMAL & FLUID ROADMAP

C-18 Pad footingBearing, sliding, overturning EN 1997-1 FOUNDATIONS ROADMAP

C-19 Retaining wallEarth pressure, stability checks EN 1997-1 FOUNDATIONS ROADMAP

C-20 Unit converterForce, stress, moment, energy, power, temperature… SI · imperial · engineering UTILITIES NEXT

C-21 Material librarySteel and aluminium grades, properties by thickness EN 10025 · EN 1999-1-1 UTILITIES ROADMAP

Statuses are a proposed roadmap — to be confirmed. A tool goes live only with its published verification cases.

WHY TRUST THE NUMBERS

Tested like a deliverable.

T1Verified against textbooksEach tool ships with worked cases from standard references; results must match before release.

T2The working is shownFormula, your numbers substituted, intermediate values and the final result — step by step.

T3Assumptions statedLimits of validity are printed next to every result, not hidden in a help page.

T4Versioned engineServer-side, tested, version-stamped — a saved result says which version produced it.