Swift Calcs
What Swift Calcs is
Swift Calcs is a browser-based engineering calculator for design and analysis. It uses textbook-style equations without code, LaTeX, markup, or special syntax, and handles, converts, and simplifies units across engineering disciplines. Its open-source mathematics engine supports symbolic calculus and numerical methods. An engineering reference library, materials database, and thermodynamic properties database provide technical reference information. Worksheets are stored in the cloud, can be shared privately or as open-source documents, and earlier versions can be restored. Plugins for Onshape and Autodesk Fusion 360 connect calculations to CAD files and can use calculations to drive geometry updates. CAD-linked calculations follow the associated CAD file's sharing settings. Professional costs $25 a month and allows four collaborators per worksheet; Business costs $45 a month and allows unlimited collaborators. A 10-day trial is available, but there is no free plan. The product is web-only and has no offline mode.
Who it suits
Professional is described for individuals or small teams of one to five. Business is intended for business users or teams of any size, especially those working with engineering calculations and CAD files.
What it does well
- Readable equations without coding syntax
- Unit handling across engineering disciplines
- Symbolic and numerical mathematics
- Cloud worksheets with revision restoration
- Onshape and Fusion 360 plugins
What to know first
- No free plan
- Web-only with no offline mode
- Professional allows four collaborators per worksheet
- Some libraries and toolboxes are marked coming soon
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Professional | $25 User / mo · Individuals or Small Teams of 1 to 5 · 4 collaborators per worksheet · Priority email support: 2 tickets per month · File revision history: up to 1 week | $25 a month |
| Business | $ 45 User / mo · Business Users or Teams of Any Size · Unlimited collaborators per worksheet | $45 a month |
As swiftcalcs.com lists them, read 11 Oct 2026. The maker's own page has the final word.
Verdict
Swift Calcs combines readable engineering math, unit management, technical references, cloud worksheets, and CAD links. Its two paid plans differ mainly in intended audience and collaboration limits, with a 10-day trial available.
Facts from Swift Calcs's own pages
- CAD integrations
- Plugins for Onshape and Autodesk Fusion 360 link calculations to CAD files and can use calculations to drive geometry updates. · swiftcalcs.com, 11 Oct 2026
- Cloud access and collaboration
- Swift Calcs runs in a browser, stores worksheets in the cloud, and lets users share calculations and restore earlier document versions. · swiftcalcs.com, 11 Oct 2026
- Coming soon
- The plan comparison marks the engineering equation and function library and custom toolboxes and functions as “Coming Soon...”. · swiftcalcs.com, 11 Oct 2026
- Engineering references
- The product includes an engineering reference library, materials database, and thermodynamic properties database. · swiftcalcs.com, 11 Oct 2026
- Intended users
- The site describes Professional as intended for individuals or small teams of one to five, and Business for business users or teams of any size. · swiftcalcs.com, 11 Oct 2026
- Math engine
- Its open-source mathematics engine supports symbolic calculus and numerical methods. · swiftcalcs.com, 11 Oct 2026
- Plan limits
- The comparison lists four worksheet collaborators for Professional and unlimited collaborators for Business. · swiftcalcs.com, 11 Oct 2026
- Purpose
- Swift Calcs is an engineering calculator for design and analysis, presented as an alternative to paper, spreadsheets, and cumbersome computation packages. · swiftcalcs.com, 11 Oct 2026
- Readable math
- It supports textbook-style math and equations without code, LaTeX, markup, or special syntax. · swiftcalcs.com, 11 Oct 2026
- Security
- The plan comparison lists full SSL encryption, view-only permissions, view-and-copy permissions, and the ability to invalidate and reset URLs. · swiftcalcs.com, 11 Oct 2026
- Sharing
- Worksheets can be private or open-source, and CAD-linked calculations follow the sharing settings of the associated CAD file. · swiftcalcs.com, 11 Oct 2026
- Support
- The plans include online forums and a knowledgebase; Professional lists two priority email support tickets per month. · swiftcalcs.com, 11 Oct 2026
- Units
- It handles, converts, and simplifies units across engineering disciplines. · swiftcalcs.com, 11 Oct 2026
Where Swift Calcs stands on Freedom251
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