offline.observer

License

// license

Last updated: 2026-06-26

The tools

The calculators and visual tools on offline.observer are free to use for personal and commercial projects. They run entirely in your browser.

Estimates only

Results are estimates provided for convenience. Real-world quantities depend on factors the tools cannot fully account for (waste, cuts, site conditions, supplier specifications, and local codes). Always confirm with a professional or supplier before purchasing materials or starting work. offline.observer is not responsible for material shortages, overages, or any costs arising from use of the tools.

Allowed

  • Use the tools for personal and commercial projects, free of charge.
  • Embed a tool on your own site using the provided embed snippet (which includes an attribution link).

Site source code

The site’s source code is based on AstroPaper and is available under the MIT License.

© offline.observer. The site design, text, and tools are the property of offline.observer.

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