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Built by a P.E.
From first equation
to final package.
Write engineering calculations, check them against the code, and run peer review in one workspace. Everything ends up in a clear, professional calculation package.
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- 3 free worksheets
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- AISC 360-22
- ACI 318-19
- NDS
- ASCE 7-22
- +more
Verified code equations, plus section and material libraries.
Starter templates for steel, concrete, and wood. Use them as-is, adapt and save your own, or build from scratch.
Maple Street Mixed-Use — Calculation Package
12 WORKSHEETS
ROOF BEAM RB-2 — FLEXURE
BASE PLATE BP-1 — BEARING
Perimeter Moment Frame ColumnYour logo here
2.0Geometry
=14ftUnbraced length
=1Effective length factorAISC 360 APP. 7
=1LTB modification factorAISC 360 EQ. F1-1
3.0Section Properties
W14×120 section properties (AISC Manual Table 1-1)
= 212 in³ = 190 in³ = 3.74 in = 4.20 in = 6.24 in = 9.37 in⁴
4.1Compression — AISC E3
=44.92governs y–y bucklingEffective Slenderness RatioAISC 360 §E2
==141.8ksiElastic buckling stressAISC 360 EQ. E3-4
=1371kipAvailable compressive strengthAISC 360 §E3
7.0Checks
1179kip≤1371kipDCR = 0.86✓ OK
208kip·ft≤789kip·ftDCR = 0.26✓ OK
J. Engineer, P.E.Page 2 of 7
One project, one package. Every worksheet typeset like this, with unit-aware math and a record behind every number. Presentation-ready, with your company logo in the header and footer.
Explore the workspace
Everything you need to finish the package.
Bring equations, units, code references, and peer review together.
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Math that reads like the textbook.
Equations are typeset the way the code book prints them: the symbolic form, the numbers substituted in, and the result with its units. No cell references and no formula printouts to decode.
[u]
Unit intelligence.
Mix kips and pounds, inches and feet, or US and SI on the same sheet. CalcPackage carries units through every operation, converts automatically, and flags any mismatch a spreadsheet would silently hide.
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Submittal-ready calcs.
Every sheet shows the equation, the substituted values, the units, and the code reference. Nothing is hidden in a cell. Export a PDF with your company logo in the header and footer. Section numbering and pagination are automatic. Drop in a table of contents or summary-of-checks block and it fills itself.
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Peer review with a paper trail.
Spreadsheet review means an emailed copy and a marked-up PDF. CalcPackage runs solo, two-person, and three-person cycles with worksheet-level dispositions and a plain-language audit trail — a workflow for effective and efficient quality management. Start two- and three-person reviews with Pro.
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Templates and libraries.
Start from CalcPackage templates or save your own for repeat work. AISC shapes and materials, NDS species, and ACI materials are built in, so section properties come from a picker, not a manual lookup.
AI
AI that explains itself.
ProAsk the worksheet a question. "Am I missing a critical check?" "Any inconsistencies or potential errors I should review?" Ask reads the whole sheet and answers with code provisions cited. Explain walks any single block term by term. Neither one edits your work: the AI reviews, you decide what to change. Generate drafts a worksheet from verified registry equations for you to review and accept.
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A real calculation. No signup.
Change the inputs, watch the results update, and follow every step.
Create a free account when you’re ready to edit the equations and save your work.
Never transcribe a code equation again.
The CalcPackage equation library puts provisions from AISC, ACI, NDS, and more a click away — rendered, unit-aware, and verified before they ever reach your sheet.
LIBRARY › AISC 360 · §F2 · LATERAL-TORSIONAL BUCKLINGINSERTED · VERIFIED
EQ. F2-6 — LIMITING LATERALLY UNBRACED LENGTH LrONE CLICK · NO RETYPING
You can manually type this equation into a spreadsheet cell or other calculation software — or insert it from CalcPackage's growing library of verified code equations.
AISCACINDSASCE+ more
Block types that think like the code.
Design codes are built on logic — conditional provisions, governing cases, load combinations, pass/fail checks. A spreadsheet buries that logic in nested IF() formulas; generic math software doesn't know it exists. CalcPackage gives each pattern a purpose-built block that keeps the logic visible on the sheet.
STEEL COLUMNWorksheet detail
Steel Column — Compressive StrengthWorksheet excerpt
Critical buckling stressAISC 360-22 §E3
Inelastic buckling
when
Eq. E3-2
Elastic buckling
otherwise
Eq. E3-3
39.53 ksibranch: Inelastic buckling controls
Example inputs, assumptions & source
AISC 360-22 §E3 flexural buckling. Concentrically loaded W-shape with non-slender elements; the example checks the controlling buckling branch.
- Unbraced length
- 12 ft
- Effective length factor
- 1
- Dead load
- 100 kip
- Live load
- 200 kip
- Steel yield strength
- 50 ksi
- Section
- W10X49
Start where you are
A clear next step, at every stage.
Explore without an account. Author for free. Upgrade when you need more.
Make it your own
$0 forever
- 3 active worksheets
- Full equation authoring & checks
- Watermarked PDF export
Bring it all together
$59 / month
or $549 / year
- AI drafts worksheets from verified code equations
- Unlimited worksheets and peer review workflows
- Clean PDFs with your company logo in the header and footer
What can I do for free?
Use the public calculators without an account. Create a free account to author up to three active worksheets: edit equations, add checks, track units, and export watermarked PDFs. There is no credit card requirement or time limit on the Free plan.
What does Pro add?
Pro includes unlimited worksheets, AI assistance on your own work, peer review, personal templates, custom libraries, and clean PDF export. It costs $59 per month or $549 per year. Generate, Ask, and Research Mode share an allowance of 100 AI calls per rolling 30 days; Explain is unmetered.
Do I have to use AI?
No. You can write equations, choose inputs, and build your worksheets yourself. Live AI assistance is optional and available with Pro. Public calculators include prepared explanations you can explore for free.
What does a verified equation mean?
Published registry equations pass automated rendering, evaluation, unit, and dependency checks, plus an administrator’s verification step. They are versioned and carry code references. You still review the equation’s applicability, your inputs, and the completed calculation for your project.
Which codes are covered?
The published equation registry includes AISC 360-22, ACI 318-19, NDS, and ASCE 7-22 equations. Coverage is growing and does not include every provision. Each public calculator states its own code basis, assumptions, and limitations.
Can I export a calculation package?
Yes. Free accounts can export watermarked PDFs. Pro provides clean PDF export with your company logo in the header and footer. Equations, units, code references, and checks remain visible in the calculation. Professional review and sealing remain with the responsible engineer.
Your work. Clearly presented.
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