Tool assumptions & limitations

Check the assumptions

Estimates depend on your measurements and product labels. Confirm coverage and matching instructions before buying; these tools do not assess structural or surface safety.

Inputs determine the result

Example values illustrate how a tool works. Replace them with your measurements and requirements. Rounding, allowances and supported cases are explained beside each tool.

Limits

These tools do not perform bookings, purchases, inspections or professional assessments. Guides are general reference material. Consult the relevant provider, product instructions or a qualified professional when your situation requires it.