Contact Us

Have a question, a suggestion, or a correction about our water fasting calculator? We'd genuinely like to hear from you.

Email us

Write to us any time at hello@waterfastingcalc.com — we read every message.

Response time

We usually reply within 2–3 business days.

What we can help with

• Feedback and suggestions for the calculator
• Reporting an error in an estimate or on a page
• Questions about our methodology and sources
• Press, partnership, and licensing enquiries

Medical questions

We can't give medical or nutritional advice. For any health concern about fasting, please consult a qualified healthcare professional.