Calculations,
not spreadsheets.
Kouzouki replaces the in-house spreadsheets that consulting engineers, architects and contractors maintain by hand — traceable structural, geotechnical, concrete, hydraulic and HVAC calculators, with every equation, substitution and code reference shown and independently validated. Need one we don’t have yet? We build calculators on request.
Explore the toolsRetire the in-house spreadsheet
Stop maintaining brittle, unversioned Excel files that one person understands. Kouzouki gives your whole firm — engineering, architecture or construction — calculators that are consistent, auditable and always current with the governing code.
Calculators built on request
Have a calculation your team runs over and over? We’ll build it into Kouzouki — your own custom tool, developed to your method and the code you cite, validated and ready for the whole office to use.
Request a calculator →Show-your-work & validated
Every result prints the full equation, the numbers substituted and the code clause — not a black box. Each tool ships with an independent validation report you can hand to a reviewer.
What are you calculating today?
Wood Design
Structural sizing to the AWC National Design Specification (NDS) and the Special Design Provisions for Wind & Seismic (SDPWS).
- Beams, columns & combined loading
- Diaphragms, shear walls & connections
- Whole-building lateral force distribution
Structural Panels
Structural insulated panels (SIPs) by sandwich theory — facings, core shear, wrinkling, deflection and buckling.
- Roof / floor and wall panels
- Facing & core checks with code references
- Validated against sandwich-panel mechanics
Foundations
Reinforced-concrete footings to IBC Ch. 18 & ACI 318 — soil bearing, shear and flexure with full code references.
- Spread (isolated) & continuous (wall) footings
- Combined two-column footings
- One-way / punching shear & reinforcement
Geotechnical
Soil capacities behind the foundation tools — bearing capacity, pile & pier axial, lateral pier embedment and earth pressure.
- Shallow bearing capacity (Vesić)
- Pile / pier skin friction + end bearing
- Lateral pier (IBC 1807) & earth pressure
Hydraulics
Open-channel and pressure-pipe flow — Manning, Bernoulli energy, pipe head loss, and specific-energy / critical depth.
- Manning flow (rect / trap / triangular / circular)
- Bernoulli energy & pipe head loss (Darcy / Hazen-Williams)
- Critical & normal depth, Froude, hydraulic jump
Concrete Design
Reinforced concrete & steel base plates to ACI 318-19 and AISC DG1 — columns, beams, walls, headers, footings & connections.
- Column P-M, beams, slender beam-columns
- Shear walls with openings & opening headers
- Footing + moment & steel base plate + moment
Mechanical
Residential heating & cooling load calculations by the ANSI/ACCA Manual J method, with equipment sizing.
- Whole-house or room-by-room loads
- Design-condition & U-value libraries
- Code-referenced, printable calc package
Wood design tools
Individual calculators
Size a single beam, column, diaphragm, shear wall or connection with your own inputs — no project required.
- Beam & column design
- Diaphragm & shear wall (segmented / perforated)
- Connections incl. Simpson hardware
Building project
Lay out shear walls in plan on each floor, distribute story forces (rigid or flexible), then design every wall and diaphragm — all in one workspace.
- Custom diaphragm shapes (rectangle, L, T, U, polygon)
- Auto-uploads shear into a calculator per element
- Toggle element tabs · 3D model of the finished building