Legal notice

Information about the publisher, hosting and use of the site.

Version prepared for launch.

The publisher’s details, contact address and hosting information must be completed before public launch. This version is private and includes a no-indexing instruction.

Using the calculators

Results depend on the inputs entered and the assumptions shown. Check measurements, pack sizes and manufacturer specifications before buying. Diagrams illustrate the method and are not construction drawings. Applicable statutory rights remain unchanged.

Content and references

The explanations, interfaces and diagrams were created for MetraNest. External references belong to their respective publishers. Citing them does not imply a partnership.

Personal data

Details are set out in the privacy policy. No payment service is offered in this version.

Contact and corrections

To report a problem, specify the page and the inputs needed to reproduce the calculation. Avoid sending personal information unrelated to your request.

Find the right tool

Your privacy

Your dimensions and projects stay on this device. Sharing links contain calculation inputs in the part of the address after #.

Essential functions

A project is saved only when you ask.

Always available

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Add to a project

A project with the same name groups your calculations. The save remains in this browser. Export a JSON copy to keep it elsewhere.

Share this calculation

This link contains the displayed inputs, without your project name. Copy it to reopen the same calculation.