Have questions, feedback, or tool requests? Reach out below.
General inquiries: support@rwqdx.top
Are the calculators free?
Yes, completely free. No registration, no premium tier, no ads that interfere with the tools.
How accurate are the results?
Calculations follow standard construction formulas and are suitable for estimation. Always verify with a professional for structural and code-critical calculations.
Do you store my data?
No. Everything runs in your browser using JavaScript. We have no access to your inputs.
Can you add a specific calculator?
Suggestions are welcome. Email us with details and we will consider it.
Are the tools mobile-friendly?
Yes. All tools are responsive and work on phones, tablets, and desktops.