ILX Calcs
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ILX Calcs: structural calculations, step by step

230 everyday calculations in steel, wood, concrete, foundations, masonry and cold-formed steel, plus wind, snow, seismic and gravity loads and analysis tools. ILX Calcs works through the applicable code provisions, shows each step with its code section, and hands you a calculation report a reviewer can follow. Built by an engineer, for engineers.

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The ILX Calcs workspace: project panel, inputs, status, live checks and the drawings of a steel beamThe ILX Calcs workspace: project panel, inputs, status, live checks and the drawings of a steel beam, dark theme
The real app: inputs, live checks and the drawings side by side.

What it does

From loads to a checked member in minutes

Pick a calculation, enter the geometry, materials and loads, and ILX Calcs does the rest: load combinations, analysis, the code checks and the report. Clear inputs, instant results and plain explanations keep you in control of every decision.

Every step shown

Each check lists the equation, the values that go into it, the result and the code section, the way you would write it by hand.

Live checks

Results update as you type, with the governing check up front and a plain note on what to change when something does not work.

Auto-design

Let ILX Calcs find the lightest W-shape, the thinnest slab or the smallest footing that passes every check, with alternatives to compare.

Loads included

Dead, live, roof, snow, rain, wind and seismic loads by type, combined with the ASCE 7-22 load combinations.

Projects and batches

Organize calculations by project, run a whole schedule of members in batch, and compare options side by side.

Nothing to install

Sign in and start calculating. Your work is saved on the server and opens on any computer you sign in from.

Materials

230 calculation types, one consistent workflow

Grouped by material, the same way you find them in the app's new-calculation wizard.

Every type, with what it covers →

Reports and drawings

Documents you can hand over

Every calculation comes with a calculation report, and the members, foundations and walls with drawings, ready for your submittal package.

  • Calculation reports with the inputs, the load combinations, every check with its equation, values and code section, and the governing case
  • Drawings as PDF and DXF: elevations, sections, reinforcement, and the shear, moment and deflection diagrams
  • Your title block, sheet size and logo, set per user and per project
  • LRFD or ASD where the code offers both, US or metric units; the report follows
Drawing sheet of a steel beam: elevation, section and the shear, moment and deflection diagrams, with the title block

Verification

Tested against published examples and hand calculations

Every calculation type is tested, on every change, against published design examples and code tables where they exist and against hand calculations from the code equations where they do not.

How ILX Calcs is tested, what the results do and do not show, and the live numbers for every calculation type →

ILX Studio, LLC is not affiliated with or endorsed by AISC, ACI, AWC, TMS, AISI, ASCE or any other code organization.

Pricing

Simple pricing, per user

Try everything free for 30 days. Then keep going for $45 a month, $400 a year, or $333.33 a year on the 3-year plan, per user.

Founder pricing: 50% off the list price for the first 100 subscribers.

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ILX Calcs (web) is the online edition of ILX Calcs. The desktop application is coming soon. More about the desktop application.

FAQ

Questions engineers ask

What does ILX Calcs calculate?

The everyday calculations of a structural engineer: steel, wood, concrete, masonry and cold-formed steel members and walls; footings, piles and retaining walls; wind, snow, rain, flood, seismic and gravity loads; and analysis tools for beams, frames, trusses, plates and section properties. 230 calculation types in all. The Features page lists every one with what it covers.

Which codes does it use?

AISC 360-22 and the 16th Edition Steel Construction Manual, ACI 318-19, NDS 2024 with SDPWS 2021, TMS 402-22, AISI S100-16, S240-20 and S400-20, and ASCE 7-22, with the design guides and other references each type names. Each calculation names the code section or equation next to every result.

Do I need to install anything?

No. Sign in and start calculating. Your projects are saved on the server, so you can pick up where you left off on any computer.

Does it support LRFD and ASD, and US and metric units?

Yes, where the code offers both: steel, wood and cold-formed steel switch between LRFD and ASD, concrete uses strength design, and masonry uses strength design or allowable stress design, depending on the calculation. US and metric units switch at any time, and the report follows.

Can it size the member for me?

Yes. Auto-design proposes the lightest or most economical input that passes every check, with alternatives, for 172 of the calculation types. You decide what to keep.

How do I know the results are right?

Every calculation type is tested against published design examples and code tables where they exist, and against hand calculations from the code equations where they do not. The Verification page shows what each type was compared with, the live numbers, every documented difference, and what the results do not show. They support your review as engineer of record; they do not replace it.

Who is responsible for the design?

You are. ILX Calcs helps you through the calculation and documents every check, but the engineer of record reviews and approves the results. See the Disclaimer.

What does it cost?

New accounts get 30 days free. After that, ILX Calcs is priced per user, monthly or yearly. The Pricing page shows the current prices and any founder offer.

Is ILX Calcs related to ILX Connection?

Both are made by ILX Studio, LLC on the same platform: the same kind of accounts, projects, settings and calculation reports. ILX Connection designs steel connections; ILX Calcs covers the members, foundations and loads around them.

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Free for 30 days. Nothing to install.

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