Terms of use

Scope

WaterCalcLab provides information and calculators for rainwater harvesting, irrigation, water storage and cost planning. These terms apply to use of the website and its tools.

Using the calculators

The calculators support information and preliminary planning. Results depend on your inputs, simplified models and the stated assumptions. Check inputs, units and results against actual local conditions.

Your responsibility

Before building, installing or operating a system, follow local rules, permit requirements, manufacturer instructions and professional requirements. This website does not replace individual advice or design by qualified professionals.

Acceptable use

You may use the tools for your own calculations and share links to results. Security interference, abusive automated access and distribution of unlawful content are prohibited. Content may be reused only where permitted by law or with permission.

Availability and changes

Content and features may be developed, changed or discontinued. Uninterrupted availability or suitability for a particular purpose is not guaranteed. Mandatory statutory rights remain unaffected.

Contact

Send questions about use and reports of errors to [email protected]. Further information is available in the disclaimer and privacy policy.

Last updated: 11 October 2026