Preliminary tools Not a design sign-off UK English Checked 3 October 2026 Disclaimer

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Cookies

This build does not set analytics or advertising cookies. A host may use a strictly necessary cookie for security. No consent banner is shown because no optional cookie is in use.

If advertising is added later, it stays off until a consent control exists, and this page will name the cookies.

What this build stores

The calculators run on your device. The pages do not set an advertising cookie and do not load an advertising script. A host may keep a server log. That log is the host's. If a measurement tag is added later, this page will say so before the tag is loaded.

No consent banner is shown because no optional tag is loaded. A banner will be required before any advertising script.

What to write beside the result

A review can only check this figure if the inputs sit next to it. Write the value, the unit and the assumption the form used. A diameter in millimetres and a diameter in metres are not the same reading. A force in kilonewtons divided as if it were newtons is a thousand-fold error.

The result is the arithmetic on this page. It is not a utilisation, not a selected product, and not a clause from a standard. If the number is going into a shared container, name the page, the date and the inputs. The file-name checker does not read the calculation.