
PTC Mathcad
Mathcad
Calcpad.eu
Blockpad.net
SMath Studio
Calculeaf
EngineeringPaper.xyz
Engineering calculation and report writing software. Live, unit-aware calculations and professional reports in one place. 7-day free trial.
Which is more popular?
Based on our record, Maxima seems to be more popular. It has been mentioned 27 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | calcauthor.com | maxima.sourceforge.io |
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| Company | Startup from Canada · 1 - 9 employees · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


CalcAuthor is engineering calculation software for engineers who need to produce submission-ready calculation reports, not just get a number. You write the calculation. CalcAuthor keeps everything around it correct as you edit: Unit-aware math — mixed units (kN/m, GPa, mm⁴) convert automatically,...
No description of Maxima yet.
What each product offers, as listed by its team.


Possible disadvantages
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As answered by people managing CalcAuthor and Maxima.
CalcAuthor's answer
Most tools either calculate or document — not both. CalcAuthor treats the calculation and the report as one connected object: units convert automatically within a formula, and the parts of an engineering report that normally require manual upkeep — table of contents, citations, cross-references, figure numbering, running headers — update themselves as the document changes. The output is a submission-ready PDF, not a raw result that still needs formatting.
CalcAuthor's answer
Spreadsheets don't understand units and produce no document structure. Legacy calculation tools like Mathcad require a desktop install and still leave document-level upkeep (TOC, citations, figure numbering) to the user. CalcAuthor runs in the browser, is built for teams (shared style presets, safe concurrent-editing via document locking), and turns a calculation directly into a submission-ready report without a separate formatting pass.
CalcAuthor's answer
Structural, civil, and mechanical engineers — and the firms they work for — who need to produce calculation packages for permit submissions, peer review, or client deliverables. Both individual engineers and engineering teams.
CalcAuthor's answer
Built on .NET 8 (C#) for the API and Blazor WebAssembly for the client, with PostgreSQL via Entity Framework Core for data. Stripe handles billing, Resend handles transactional email, and Cloudflare Turnstile protects signup from automated abuse. Hosted on Render.
CalcAuthor's answer
CalcAuthor is used by individual structural, civil, and mechanical engineers producing calculation packages for permit submissions and client deliverables, as well as engineering teams and firms that need consistent report formatting and unit-aware calculations across multiple engineers working on the same projects.
CalcAuthor's answer
CalcAuthor started from the day-to-day frustration of writing an engineering calculation report: switching between a calculation tool, a word processor, and a spreadsheet just to produce one document. Every edit meant redoing work by hand elsewhere — adding a section meant renumbering the Table of Contents, List of Figures, and List of Tables manually; mixing unit systems meant tracking conversions yourself with no safety net; and keeping formatting consistent across a long report meant constant re-checking instead of writing. CalcAuthor was built to collapse that into one tool, where the calculation, the units, and the document structure all stay correct automatically as the report is written.
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External articles and on-site reviews we used to compare the two products.


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Another alternative to MATLAB is Maxima which is a computer algebra system (CAS) for manipulation of symbolic and numerical expressions including differentiation, integration, Laplace transformation, linear algebraic...
Another alternative of Matlab is Maxima which was inspired by the legendary Algebra system Macsyma. It is a system used for manipulating numerical expressions such as Taylor series, Laplace transformations, Vectors,...
I've been using Maxima since my undergraduate (over 10 years), now with Ubuntu20.04 lts, I become a newbie of SageMath. For a small project (both symbolical and numerical), in particular, student lab activities,...
Recommendations tracked on public social media and blogs since March 2021.


Tracking CalcAuthor since Oct 2026.
I think the really neat piece of software behind this is maxima (https://maxima.sourceforge.io/), a rather influential computer algebra system of ancient lineage still in use today in more place than you might think. - Source: Hacker News / over 2 years ago
In the maxima computer algebra system[1] which was ancestrally based on lisp it has a single quote operator[2] which delays evaluation of something and a "double quote" (which acually two single quotes rather than an actual double quote)... - Source: Hacker News / over 2 years ago
Use wxmaxima, a free and open-source computer algebra system:. Source: almost 3 years ago
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