Terms of Use

Service scope

The service provides calculators, converters, and larger technical tools. Features, models, and data scope may be corrected or updated as the project develops.

Responsible use

• Do not disrupt the service or bypass technical safeguards.
• Do not use feedback for spam, unlawful content, or confidential data.
• Before applying a result, check the inputs, assumptions, units, and project requirements.

Results and availability

Absolute error-free operation and uninterrupted availability are not guaranteed. Liability remains subject to rights that cannot lawfully be excluded. Critical decisions require applicable standards, independent verification, and a competent professional.

Reports and contact

Submitted reports may be used to investigate errors and improve the service. Providing an email address is voluntary. The public general-contact address is shown below.

Voluntary support

Project support is entirely voluntary, gives no additional access to features, and is not a purchase of a premium version or a subscription.

Payment takes place in the external PayPal service. CindrenCalc has no checkout, does not handle the transaction, and does not create its own rules for PayPal payment refunds.