Terms

Last updated 15 October 2026. These terms cover the payload calculator and the tyre tool on Motorhome Payload Calculator.

An estimate, not a plated weight

The figures are a planning estimate. They are not a legal weighbridge ticket and they do not change the plated Maximum Authorised Mass (MAM). Always verify with a calibrated weighbridge. The VIN plate on your vehicle takes priority over anything this site shows.

Under MAM but over on an axle is still a fail. This site will not invent an axle split from people or kit.

Plate lookups

A UK registration lookup is sent to a Cloudflare Worker, which asks DVLA for make, year and revenue weight. That revenue weight is not a promise of Mass in Service, and it is not a substitute for the VIN plate. Demo plates are sample records, not live DVLA results.

Tyre pressures

The tyre tool shows a cold pressure only when a listed manufacturer table has one. If your size is not covered, it refuses a number. Tyre capacity is not permission to exceed the vehicle axle, wheel or legal limits. The tyre maker and a fitter take priority. Wrong pressure or an overloaded tyre can be dangerous.

Use of the site

The tools are free. There is no account. The site does not use tracking cookies. You are responsible for the figures you drive with.

Motorhome Payload Calculator is not affiliated with Fiat, Peugeot, Citroën, DVLA, or any converter or tyre maker.

The site is provided as available. It can change or be unavailable. These pages do not publish a personal name or an email address.

See also Privacy, Cookies and Accessibility.